1 Under more favorable conditions,we-----better.
B
A need have done 本应该（但却没有） B should do应该 C could have done本应该（但却没有） D might be doing （X）
2 She promised to come but she hasn't ----yet.
C
A put up穿上,戴上...B picked up捡起 C turned up出现,露面 D woken up工作做完
3 Goodbye!I'm glad --you.
----,too!
B
A to see;I B to have seen（完成时,动作已经发生,注意goodbye）; Me C to see; Me D seeing;I
4 The train he was looking forward to------only a minute ago.
D he was looking forward to 是修饰中心词train
A arrive B arriving C arrived D had arrived
5 Only after the other train pulled out of the station-----that it was moving.
B被动句 ,Only after是关键.
A could see B could we see C we saw D do we see
6 Who is ---starting the bush fire.
B to blame句子才完整,blame 前面要有介词； for连接后面的句子
A blame 两个动词不可能连在一块 B to blame for C blamed D blame fo