21. If you ____ see Mr. Allen, give him my regards.
A. should
B. would
C. shall
D. will
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22. You are late. If you ____ a few minutes earlier, you ____ him.
A. come; would meet
B. had come; would have met
C. come; will meet
D. had come; would meet
23. He looked as if he ____ ill for a long time.
A. was
B. were
C. has been
D. had been
24. ---Why do you look so upset? ---I broke up with my girlfriend. If only I ____ more about her.
A. care
B. cared
C. had cared
D. had been cared
25. ---"I’ve told everyone about it. ---"Oh, I’d rather you ____."
A. don't
B. hadn't
C. couldn't
D. wouldn't