21. Little ______ when 1 took the trip where it would lead me.
A. have I known B. had I known C. do 1 know D. did I know
22. —— Have you ever seen anything like that before？
---- ____.
A. No， I never have seen anything like that before
B. No， never I have seen anything like that before
C. No， never have 1 seen anything like that before
D. No， I have seen anything like that before never
23. _____ ， 1 would accept the invitation and go to the party.
A. Were I you B. Was I you C. Had I been you D. Would 1 be you
24. You should work less _____.
A. and neither should I B. and so should I C. and nor should I D. and so I should
25. _____ and caught the mouse.
A. Up the cat jumped B. The cat up jumped C. Up jumped the cat D. Jumped up the cat
