[单项选择]All of a sudden, we saw the aircraft ______ and burst into flames.
A. crash
B. fall
C. drop
D. break

[单项选择]All of a sudden, we saw the aircraft ______ and burst into flames.


A. crash
B. fall
C. drop
D. break

[单项选择]Beyond ______ stars, the astronauts saw nothing but ______ space.
A. the, /
B. /,the
C. /,/
D. the, the

[单项选择]Our statistics show that we consume all that we are capable of producing
A. waste
B. buy
C. use
D. sell

[单项选择]We have sent an order slip to all that we have reason to believe are interested in our books.（　）
A. who are believed by us
B. with who we have reason to believe
C. who we have reason to believe
D. with whom we believe

[单项选择]First of all, we applied ourselves to identifying the root cause of our national problems.
A. 首先，我们致力于找出民族问题的根源。
B. 起初，我们申请了研究民族问题。
C. 首先，我们要了解民族问题存在的原因。
D. 起初，我们应弄清民族问题的原因。

[单项选择]When we saw his face, we knew ______ was bad.

[单项选择]We saw several natives advancing towards our party, and one of them came up to us, ______ we gave some bells and glasses.
A. to which
B. to whom
C. with whom
D. with which

[单项选择]

 All that we really need to plot out the future of our universe are a few good measurements. This does not mean that we can sit down today and outline the future course of the universe with anything like certainty. There are still too many things we do not know about the way the universe is put together. But we do know exactly what information we need to fill in our knowledge, and we have a pretty good idea of how to go about getting it. Perhaps the best way to think of our present situation is to imagine a train coming into a switch yard(调车场). All of the switches are set before the train arrives, so that its path is completely determined. Some Switches we can see, others we cannot. There is no ambiguity (不明确) if we can see the setting of a switch; we can say with confidence that some possible futures will not materialize (实现) and others will. At the unseen switches, however, there is no such certainty. We know the train will take one of the tracks leading out, but we have n
A. They tell us which one of the tracks the universe will use.
B. They enable us to alter the course of universe.
C. They give us information about the lunar surface.
D. They determine which course the universe will take in the future.

[单项选择]The purpose of the scope statement includes all but which of the following:
A. Provides a basis for future project decision
B. Establishes a contract between the project team and the custome
C. Sets criteria to use to determine if a project or phase have been completed successfull
D. Establishes project constraints and assumption

[单项选择]When we drove to the country, we saw many ________.
A. herds of cattles
B. herds of cattle
C. herd of cattle
D. herd of cattles