21.The China Education Expo 2010 provides visiting students with ________ wealth of information on ________ options open to them for overseas study.
A.a ; / B./ ; the C.a ; the D./ ; /
22. –I don’t suppose he could have done well in the exam last week, _____?
--______, he almost failed the exam.
A. had he; Yes B. did he; No C. do I ; Yes D. could he; No
23. –There, I told you there was a sculpture outside the restaurant .
--_________--how strange I hadn’t noticed it.
A. So there is B. There is so C. So is there D. There so is