题目内容

I"ve always really had to depend on having someone else for the ______ stuff so that I can keep things fairly simple for myself.

A. intricate
B. striking
C. superb
D. sumptuous

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Some people viewed the findings with caution, noting that a cause-and-effect relationship between passive smoking and cancer remains ______.

A. to be shown
B. to have been shown
C. to have shown
D. being shown

I ______ to him because he phoned me shortly afterwards.

A. ought to have written
B. couldn"t have written
C. must have written
D. needn"t have written

Once they had fame, fortune, secure futures; ______ is utter poverty.

A. Now that all is left
B. Now all which is left
C. Now all that is left
D. Now all what is left

The ratio of the work done by the machine ______ the work done on it is called efficiency of the machine.

A. against
B. to
C. with
D. for

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