问题补充:
The headmaster suggested that a good preparation ahead of time.
A. must be made
B. should be made
C. will be made
D. can be made
答案:
A. must be made
(答案→)B. should be made
C. will be made
D. can be made
解析:suggest表“建议”时,在其宾语从句中,谓语动词用“should+动词原形”。