30.　 There are many _______　 in the tree.(小鸟)

29.　 People can borrow books from _______(.图书馆)

28.　 We must keep our classroom ______and tidy(干净的).

27.　 The __________on sale are very cheap.(照相机)

26.　 His wife is a bank ________(.职员)

25.　 Do you like reading _______.(杂志)

24.　 _______is the second season in a year.(夏天)

23.　 Lions are very ______(危险)

22.　 Miss Wand works too hard ,she is ill in _____(.医院)

21.　 ________are usually strong and brave(男警察)