Question

谁能帮我解析几道英语习题

1.Tom had opened the door _____ mary had time to knock.
A.until B.before C.as D.although
2.It's high time you ______.
A.do you homework B.would have done your homework
C.had done your homework D.did your homework
3.The bus wsa held up on way to the airport,otherwise I_____the plane.
A.must catch B.have caught C.could have caught D.ought to catch
4.Let's ____when the train will arrive.
A.discover B.find C.find out D.look
5.If this continues to tske place at the present rate,____another fifty years,the world will be crowded with big ants.
A.at B.for C.in D.on
6.john will ___ Jack to be the general manager,for Jack is goning to channge his work.
A.take place B.take the place of C.take his place D. take the place

Answer 1

1.b
Mary还没敲门，Tom就已经把们打开了，before表示顺序关系
2.a
现在正是做作业的时候，除了一般时态别的时态都不合适
3.c
这里用虚拟语气，只能选could have caught
4.c
find out这里表示“查明”，discover（发现），find（寻找），look（看）都不合适
5.c
in表示将来一段时间内会发生
6.b
这里只有take the place of 后面能接名词

Answer 2

1b
2a
3c
4c
5c
6b

Answer 3

1-6BDCCCB

Answer 4

bacccb