21. ----May I have a look at your books?---______
A By this means B By all means C By this way D By any means
22. It’s very important for a student to ___ a good state of mind while taking the college entrance examination.
A keep out B keep on C keep up D keep off
23 ____we can’t understand is ____he didn’t join us in our discussion.
A. That; why B. Which; how C. What; what D. What; why
24 Word came _____ his poem won the first prize.
A. that B. whether C. as D. because