【推荐1】World Environment Day is a UN Environment-led global event,     1     takes place on June 5 every year and is celebrated by thousands of communities worldwide. Since it began in 1972, it has grown to become the     2     (large) of all the celebrations of environment each year. China owns half the world’s electric vehicles and 99% of the world’s electric buses. By     3     (host) World Environment Day 2019, the Chinese government will be able to showcase its innovation and progress toward a cleaner environment.

【推荐2】单句语法填空
1. After a careful examination, the police finally found the drugs ________（hide）in the walls of her house.
2. She pretended ________（listen）to the manager, but actually she was thinking about something else.
3. Belfast Zoo is home to more than 1,000 animals, many of ________ are in danger of extinction(灭绝).
4. At two years of age, some kids may only use about 30 words ________ others may be able to use 300 words.
5. The key to ________（become）more efficient is to improve the ability to set priorities(优先事项) and focus on one task at a time.
6. The injury could mean this famous basketball player ________（miss）next week’s game.
7. Since then, all Chinese retailers have been banned ________ providing free plastic shopping bags.
8. That fierce wolf had eaten most of his sheep, with only a few sheep ________ (wander) about.
9. ________ you grow rapidly through your teenage years, you will experience a lot of changes.
10. There was some ________ (confuse) as to whether our class had won or lost.

【推荐3】定语从句对比练习
1. a. This is the house ________ I lived last year.
b. This is the house ________ I bought last year.
2. a.I think Beijing is the most beautiful city, ________ has a population of over 20, 000, 000.
b. Beijing is the most beautiful city ________ I have ever visited.
c. I think Beijing is the most beautiful city, ________ I spent my last summer holiday.
3. a. I'll spend my holiday in Shanghai, ________ lives my uncle.
b. I'll spend my holiday in Shanghai, ________ lies on the coast.
4. a. This is the very room ________ I slept in that evening.
b. This is the very room ________ I slept that evening.
5. a.I will remember the days ________ I spent with you at college.
b. I will remember the days ________ I studied with you at college.
6. a. That is the reason ________ he didn't go to college.
b. That is the reason ________ he told me yesterday.