7．He was lying in bed ________ (安静)looking at the ceiling．

6．Some animals，for example，elephants and koalas，live on grass and ________(树叶)．

5．My bag is big．What about ________(你的)?

4．Lisa is such a shy girl that it's hard for her to sing in p________．

3．Camels can live quite a few days w________ water and food in the desert．

2．His uncle went abroad five years a________．

根据句意和提示完成单词，使句子语法正确，意义通顺。

1．Of all the s________，I like summer best．