单项选择题

Most computer users are () threat from computer viruses.

A. within
B. upon
C. towards
D. under

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单项选择题
()everyone’s here, she said, let’s begin to discuss it.

A. As far as
B. Now that
C. So far
D. By far
单项选择题
It wasn’t such a good dinner ()she had promised us.

A. like
B. as
C. which
D. what
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