A、 has
B、 have
C、 will
D、 would
答案：B
解析：解析:never before开头,句子倒装。主语so many people为复数。engage in doing sth. 忙于做某事。
A、 has
B、 have
C、 will
D、 would
答案：B
解析：解析:never before开头,句子倒装。主语so many people为复数。engage in doing sth. 忙于做某事。
A. in which
B. on which
C. of which
D. at which
A. go
B. went
C. will go
D. am going
A. more than
B. as much as
C. as many as
D. than”as+原级+as"可以用来表示倍数。解析:The new model costs twice more than last year＇s.
A. do harm for
B. do harmful to
C. do harm to
D. do harmful for
A. his luggage was loaded
B. had his luggage been loaded
C. loaded his luggage
D. his luggage was being loaded
A. would destroy
B. would be destroyed
C. would have destroyed
D. would have been destroyed
解析：解析:broke out(break out) 爆发
A. 重要保障
B. 依靠力量
C. 国际基础
D. 必要条件
A. depend on
B. turn to
C. put up
D. stick to
解析：解析:depend on 依靠、依赖解析:turn to 转向某人,turn to sb.向某人求助解析:put up with 容忍、忍受解析:stick to 遵守
A. taking
B. being taken
C. to have taken
D. have been taken
解析：解析:remeber doing 记得过去做的事情
