A. has come B. did come C. came D. had come
22. When a pencil is partly in a glass of water, it looks as if it ______.
A. breaks B. has broken C. were broken D. had been broken
23. You didn’t let me drive. If we ______ in turn, you ______ so tired.
A. drove, didn’t get B. drove, wouldn’t get
C. were driving, wouldn’t get D. had driven, wouldn’t have got
24. Without the air to hold some of the sun’s heat, the earth at night _______, too cold for us to live.
A. would be freezing cold B. will be freezing coldly
C. would be frozen cold D. can freeze coldly
25. If only he _______ quietly as the doctor instructed, he would not suffer so much now.
A. lies B. lay C. had laid D. should lie
26. What would have happened ________, as far as the river bank?
A. Bob had walked farther B. if Bob should walk farther
C. had Bob walked farther D. if Bob walked farther
【参考答案】1—5 BABCA 6—10 BBCAC 11—15 ABADD 16—20 BDADB 21—16 DCDACC
相关阅读：
专四语法总结
专四语法讲义
四级语法题练习汇总
