Bao Bao,     1     (bear)at the National Zoo in Washington, started settling into her new home Thursday in southwest China. Under a(n)     2     (agree) between China and the US, such baby pandas must be returned to China before they are 4 years old, the earliest age when they might begin to produce young.

The 3-year-old landed in Chengdu in Sichuan Province on Wednesday after a 16-hour flight, during which she    3     (look) after by a professional panda keeper Marty Dearie from the National Zoo.

Bao Bao, whose name    4    (mean) “treasure”，will first go through a month-long quarantine (隔离期) at the Dujiangyan base,    5     keepers will monitor her diet, activities and health during that time.

A 100-square meter area of land has been prepared     6     her at the base, including both indoor     7     outdoor play areas, equipped with rubber balls and a tire swing for entertainment and fresh bamboo and apples for eating. Keepers will work hard     8     (help) BaoBao get used to local bamboo and other Chinese foods.

Having been considered as one of the world’s most endangered     9     (animal), giant pandas live     10       (main)in the mountains of Sichuan, with some also found in neighboring Gansu and Shaanxi Province.

When you don't have a greenhouse or enough room on the balcony for a few pots, you can still grow    1    (you) a few tasty home-grown tomatoes in hanging baskets ans window boxes if you stick to short varieties. I’ve even heard of these being grown by canal-boat    2    (owner) on their cabin（船舱）roof, since they’re short enough to fit under the bridges.

You might have trouble    3    (find) suitable plants later but there’s still time to raise your own form seed if you start straight away. Look for small “tumbling”（下垂的）varieties such           4    Totem and Gartenperle. If you live in a    5    (nature) cold area, it’s worth looking out for a unique variety called Sub-Arctic Plenty, which has    6    similar size and habit but performs better than most in cooler climates.

All of these will make short plants ideal for pots; they can    7    (place) anywhere with limited space, as long as it’s sheltered and    8     (sun). What’s more, tumbling tomatoes are very easy    9    (grow)because they don’t need to have any side shoots removed and    10    do they need more than a few short sticks for support. Simply water, feed and pick.

The earliest elephant relatives     1    (originate) in Africa about 60 million years ago and were driven away to every continent on earth, except Antarctica and Australia. There are about 165     2    (know) elephant species from the fossil record. However, scientists estimate that there would have been many — more species that we haven’t found yet in this branch of     3     evolutionary tree of life.     4     Earth’s more recent history, between 50,000 and 40,000 years ago, there were 16 species of elephants with their relatives     5    (live) at the same time around the world, including at least seven in the United States. Today, there are only three species of elephants that remain: the African savannah elephant (萨凡纳象), the African forest elephant, and the Asian elephant.     6     (population) of all three species are declining, with Asian elephants    7     (current) at a much higher risk of extinction.

Today’s elephants are part of the order Proboscidea (长鼻目) that consists of modern elephants and their extinct relatives. This kind of, the animals     8    (have)a proboscis, or trunk, which they use to eat and drink.     9    today there are only three species of elephants surviving, their evolutionary history is much     10     (diverse).