21. Class 1 is selecting ______ new monitor. Peter is so popular that he may be elected ______ monitor.
A. a; / B. /; a C. a; the D. the; a
22. Every minute should be made full use of _____ the coming international games.
A. preparing B. to prepare for C. to prepare D. preparing for
23. Judging from his ______ look, Mike was entirely unprepared for the ______ news.
A. shocking; frightening B. shocked, frightened
C. shocking; frightened D. shocked; frightening
24. — Have you been here before?
— No. It is the first time that I ______ here.
A. have been B. have gone
C. had gone D. had been