Across the globe today, there     1     (be) still so many challenges to be solved when it comes to food security. With the Earth’s population expected to three times in     2     (little) than a century, the ongoing struggle to feed the present population continues to be a difficult problem across the globe, there is an     3     ( increase) anxiety for the agricultural department. Not only do we need     4     (improve) the practical usage of food across the globe, but also we should broaden the crop strains. We have to make sure of sustainability (可持续性) according to     5     recent study.

The increase in consumer demand (消费需求) in western countries for foods, such as coffee, fruit and vegetables, has resulted     6     the change of the natural cycle of the environment     7     they are produced. Western eating habits are now     8     ( obvious) affecting the global food security. Growing a crop that requires the same fertilization patterns is     9     (harm) to the balance of our global food cycle.     10     (insect) must be able to have access to their source of nutrition all year round if they are to play an important role in our food cycle.

Everywhere we look, we see advertisements that urge us to buy. Most people only buy    1    they need and can afford. However, there are some people,     2     (call) shopaholics, who can’t control their desire to spend money and buy things. This kind of addictive behavior can lead to large financial problems, family conflict and deep unhappiness.

Shopaholics often spend hours and hours    3     (shop)on the Internet or at the mall. Although their closets are full of clothing and jewelry that they have never worn and their homes may    4     (pack) with shopping bags and boxes that they bought but never used, many shopaholics    5     (simple) can’t resist the urge to buy. Some of them are ashamed    6    their weakness and try to hide it by storing their purchases in places like the attic, where others won’t see them.

There are several reasons for shopping addiction. For some people, it is a way of relieving stress. For    7    ,shopping is a way to fight loneliness or depression. Sometimes the problem develops out of boredom.     8    shopping can temporarily make people feel good, they often experience feelings of shame and guilt later. When shopping habits get out of control, people need professional help. They can either see a counselor (顾问)     9    join an organization,     10    goal is to help people find ways to fulfill themselves that do not lead to serious debt and troubled lives.

Celebrities like Olivia Munn are among those     1    have opposed wearing animal fur. Now, San Francisco has become the     2    (large) city in the USA to ban people from selling new fur to their consumers.

The ban is aimed to send     3     strong message to the fur industry that the cruelty these animals endure for the purpose of becoming clothing is not consistent     4    the values of our city.

As we know, West Hollywood became the first city in the United States     5    (forbid) the sale of new fur items in 2011, and Berkeley passed a ban on the sale of fur clothing last year.     6    (actual), in 2000, the UK took action first,     7    (follow ) by Australia in 2004. More recently, the Netherlands, the European Union’s largest producer of fur, banned fur farming in 2012 and plans to end mink farming by 2024. Earlier this month, Norway banned fur farming and     8    (end) fox and mink farming in the following several years.

It     9    (report )that San Francisco’s ban will go into     10    (affect) in 2019. Hopefully, efforts like this will continue to encourage businessmen and customers to stop purchasing real animal fur and, thus, further protect the lives of animals everywhere.

The center of American automobile innovation     1    (move) 2,000 miles away in the past decade. It has migrated from Detroit to Silicon Valley,     2     self-driving vehicles are coming into life.

In a bid to take production back to Detroit, Michigan lawmakers have introduced legislation   that could make their state     3    (good) place in the country, if not the world, to develop self-driving vehicles and put them on the road.

“Michigan’s role in auto research and development is under attack from several states and countries which desire to take     4     place of our leadership in transportation. We can’t let happen,” says Senator Mike Kowall, the lead sponsor of four bills     5    (recent) introduced.

If all four bills pass as     6    (write), they would represent an important update of Michigan’s 2013 law that allowed the testing of self-driving vehicles in limited conditions. Manufacturer would have nearly total freedom     7    (test) their self-driving technology on public roads. They would     8    (allow) to send groups of self-driving cars on cross-state road trips, and even set on-demand rows of self-driving cars, like the one General Motors and Lyft are building.

Lawmakers in Michigan clearly want to make the state ready for the commercial use of self-driving technology.     9    contrast, California, home of Silicon Valley, proposed far more restrictive rules that would require human drivers be ready for the commercial     10    (apply) of self-driving technology.