Computersareusedinalmosteveryfieldnow,buttwentyyearsago...
来源:语文精选馆 2.67W
问题详情:
Computers are used in almost every field now, but twenty years ago, no one ________ imagine that they were to become so popular and useful.
A. should B. could C. need D. must
【回答】
B
知识点:情态动词
题型:选择题