3.C。“not a (an)+可数名词的单数形式”提前到句首时，句子要用部分倒装。

2.A。

1.C。

25.＿＿when we passed by its nest.

　　 A.Up into the blue sky did the bird fly　

　　 B.Up into the blue sky the bird flew

　　 C.Up into the blue sky flew the bird

　　　　 D.Flew up into the blue sky the bird

24.Since everyone has come back here,＿＿＿.

　　 A.on goes our discussion　

　　 B.goes on our discussion

　　 C.on does our discussion go　

　　 D.does on our discussion go

23.If you don’t go to his birthday party next Friday,＿＿＿＿＿.

　　 A.so do I　　 B.so will I　　 C.nor do I　　 D.nor will I

22.He is strict in everything and strict with everyone.＿＿＿＿＿.

　　 A.My father is always such

　　 B.My father is always so a strict man

　　 C.Such is my father

　　 D.So a strict man is my father

21.Nothing but two ancient Chinese coins ＿＿＿＿ after they took out the jar.

　　 A.did they find in it　　　 B.they found in it

　　 C.in it did they find　　　 D.in it found they

20.＿＿＿these ancient buildings in this city are!

　　 A.What perfectly protected

　　 B.How perfect protected

　　 C.How perfectly protected

　　 D.What perfect protected

19.＿＿＿＿＿,she may not catch up with her sister Lisa.

　　 A.Hard though she works

　　 B.Hard although she works

　　 C.Hard works she　　　 D.Hard even if she works