Ⅰ.单词拼写
1．She has a degree in ________(生物学)．
2．An apple falls down because of ________(重力)．
3．The moon is a ________(卫星) of the earth.
4．He is a lovely boy, very ________(温和的) and caring.
5．He is a ________(物理学家) of the first rank.
6．Some plants will not grow in a cold ________(气候)．
7．Another ________(宇宙飞船) has been sent up recently.
8．A small crowd attempted to ________(拉) down a statue.
9．When you're tired of swimming, just ________(漂浮) for a while.
