1. — Can you come to a party on Saturday, Peter?
— Oh, ______I'm already going out, I'm afraid.
A. what a pity! B. don't ask! C. how come? D. so what?
22. If you come to visit China, you will ______ a culture of amazing depth and variety.
A. develop B. create C. substitute D. experience
23. ______ scientists haw learned a lot about the universe, there is much we still don't know.
A. Once B. Since C. Though D. Unless
24. Just as I got to the school gate, I realised I ______ my bank in the cafe.
A. have left B. had left C would leave D. was leaving
25. A ship in harbor is safe, but that’s not ______ ships aw built for.
A. what B. whom C. why D. when
36. I’m so ______ to all those volunteers because they helped my terrible day end happily.
A. special B. superior C. grateful D. attractive
27. ______ the difference between the two research findings will be one of the worst mistakes you make.
A. Ignore B. Ignoring C. Ignored D. Having ignored
28. Some experts think reading is the fundamental skill upon______ school education depends.
A. it B. that C. whose D. which
29. It is reported that a space station ______ on the moon in years to come.
A. will be building B. will he built C. has been building D. has been built
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