21. ---I wonder if you can drop by tomorrow evening. The Smiths are coming over for dinner. I’d like you to meet them.
---____________. I’ve heard they’re very interesting people.
A. Sure. I’d love to B. Sorry. I can’t
C. I’m afraid I won’t be free D. Yes. I will
22. ---Of the two houses we saw today, which do you prefer?
---I think ____ white one is prettier, but ____ brick one has ___ bigger yard, so I like it better.
A. a, the, a B. the, the, a C. the, a, the D. the, the, 不填
23. ---You look pale. What’s the matter?
---Not very well. I was sick most of the night. I ___________something _____ doesn’t agree with me.
A. must eat, that B. may have eaten, which
C. may eat, what D. must have eaten, that
