20.They have planted more than two 　　　　(千) young trees this spring .

Ⅷ .根据句子的意思和首字母提示，用适当的词填空，使句子的意思连贯与正确。

19.Your hands are so 　　　　(脏的) again .Go and wash them .

18.Is there a 　　　　(书桌) in your room ?

17.He won’t do it .I won’t do it ,　　　 (也) .

16.It is an 　　　　(容易的) question .I can answer it .

15.-Excuse me ,may I 　　　　(借) your eraser ?

-Certainly .here you are .

14.Mr Smith will give us a talk at the 　　　　(会议) .

13.Lucy studies 　　　　(努力地) than Lily

12.There are ten 　　　　(班级) in our grade .

11.I usually go to work on 　　　　(步行) .