单项选择
21.On Feb 27, Chinese Premier Wen Jiabao took part in _____ online chat with Chinese netizens, who expressed interests and concerns over property prices, inflation, ________ wealth gap and other social issues.
A. the ; a B. an ; / C. the; the D. an ; the
22. —— We didn't find Smith attending the lecture.
—— No one ____ him about _____ a lecture the following day.
A .told ；there to be B. had told ; there to be C. told; there was D. had told ; there being
23. Tick bites（蜱虫叮咬）are reported _______ in 12 provinces and claimed 31 lives since 2007.
A. to break out B. to have broken out
C. to be broken out D. to have been broken out
24. Unable to practice their traditions, many young Roma ________ illegal behaviour, such as stealing, and were
