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问几道托业的题If he took Flight 307,he _______ on timeA arrives B w

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问几道托业的题
If he took Flight 307,he _______ on time
A arrives
B was arriving
C would have arrived
D arrived
为什么选D?疑惑中!
By this time next year, merchandising______ greatly improved
A has been
B is going to be
C is
D is being
为什么选B?同上
The survey indicates profits are up; business______
A is being good
B were good
C good
D has been good
为什么选D?
Before the reasearcher analyzed the results, the company___ to take on the client
A has agreed
B agreed
C agrees
D was agreed
为什么选B
这几道题我选的分别是C A A A
大家有多少说多少吧
谢谢了
问几道托业的题If he took Flight 307,he _______ on timeA arrives B w
1.if引导的条件句有两种:一种是虚拟条件句,另一种是真实条件句表示可能成为现实的情况.这些句子中假设的情况都是可能发生的,句中谓语都使用陈述语气.此题就是第二种情况.
2.“到明年这个时候...” 将来时,而且"be going to +V原形" 表示说话人的意图和打算.
3.一般现在时描述“利润上升了”,说明(迄今为止这段时间)生意不错;表示迄今为止这段时间发生的事情用 现在完成时.
4.如果要用完成时,也必须是过去完成时 had agreed,因为之前所使用的是analyzed,所以排除A.根据句意选B.