21.        Number of visitors were shocked by       number of the butterflies around the big tree.

A. A; a        B. A; the      C. The; a       D. The; the

22. The teacher told us        so much noise.

A. don’t make      B. not make    C. not making    D. not to make

23. Please       all the figures to see how much they      .

A. add; add up to     B. add up; add up to     C. add up; add up     D. add; add to

24.——Tom is very stupid. He failed to pass the exam once again.

——He is       than stupid.

A. lazy      B. no lazier      C. more lazy      D. lazier rather

25.Many children,        parents are away working in big cities, are taken good care of in the village.

A. their      B. whose      C. what      D. with whom

26.In order to have a good       of English, he determined to go abroad for further education.

A.command      B.need      C.master      D.direction