单项选择题

The examination has been cancelled. You ______ all that revision, after all.

A. didn't need to have done
B. needn't have done
C. need to do
D. needn't do
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单项选择题
At first the company refused to purchase the equipment, but this decision was ______ revised.
A. subsequently
B. successively
C. predominantly
D. preliminarily
单项选择题
The sleepy truck driver _______ and narrowly missed _______ into the tree.
A. switched, to crash
B. swung, crashing
C. switched, crashing
D. swerved, crashing
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