30. Jack ______ yet, otherwise he would have telephoned me.

　　　 A. mustn't have arrived　　　　　 B. shouldn't have arrived

　　　 C. can't have arrived　　　　　　 D. needn't have arrived

29. You're wet through. You_______ in the rain.

　　　 A. must get caught　　　　　　　　 B. must have caught

　　　 C. could get caught　　　　　　　 D. must have got caught

28. Mary knows a lot about China. She ______ there.

　　　 A. must be　　　 B. must have gone C. must have been　 D. can have been

27. Jack ______ to Japan, for I met him in the bookstore just now.

　　　 A. can't go　　 B. couldn't go　　 C. mustn't have gone　 D. can't have gone

26. --Did he catch what you said?　 --Well, he is not _____ clever.

　　　 A. this　　　　 B. as　　　　　　 C. that　　　　　 D. such

25. _______ little children made _______ many toys.

　　　 A. Such; so　　 B. So; such　　　 C. So; so　　　　 D. Such; such

24. This is the way ______ he worked it out.

　　　 A. /　　　　　　 B. in which　　　 C. how　　　　　　 D. A and B

23. They told me that he had left for the country some days ______.

　　　 A. ago　　　　　 B. before　　　　 C. soon　　　　　 D. after

22. The stockings are so worn out that they can't be mended ________.

　　　 A. no longer　　 B. no more　　　　 C. any longer　　 D. any more

21. E-mail, as well as telephone, ____ an important fact in daily communication.

　　　 A. is playing　 B. have played　　 C. are playing　　 D. play