单项选择题

Since the matter was extremely,（）we dealt with it immediately.

A. tough
B. tense
C. urgent
D. instant

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单项选择题

I’d just do as soon as you（） the research yourself

A. do
B. will do
C. would do
D. did

单项选择题

The man who never tries anything new is a(n)（）on the wheels of pro gress.

A. obstacle
B. brake
C. break
D. block

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