单项选择题

Rich ______ he is, Mr. Johnson is by no means a happy man.

A. if
B. as
C. whether
D. when
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单项选择题
He must practise often ______.
A. so that he may speak fluently
B. unless he will speak fluently
C. if he could speak fluently
D. so that he would speak fluently
单项选择题
They climbed to the top of the building ______ they could get a bird-eye view of the city.
A. though
B. in order that
C. for which
D. that
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