英语题,要解释和答案1.Amy did best in the English test.She ( ) hard la

1.Amy did best in the English test.She (B ) hard last week
A.must have working B.should heve worked C.should work D.must work
这里should have done表示由之上事实推测,A选项语法错误.
2.The fire spread through the hotel very quickly but everyone (D ) get out
A.had to B.would C.could D.was able to
指过去某时或某个时刻设法做成某事,不用could,而用waswere able to,managed to do或succeeded in doing等.

1. must have worked 才对， 表示对过去的猜测
2。 D
表示经过努力做成的事情，could 表示一般的会