单项选择题

We have been told that under no circumstances ______ the telephone in the office for personal affairs.

A．may we use
B．we may use
C．we could use
D．did we use
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单项选择题
This crop has similar qualifies to the previous one, ______ both wind-resistant and adapted to the same type of soil.
A．being
B．been
C．to be
D．having been
单项选择题
______ in this way, the situation doesn't seem so disappointing.
A．To look at
B．Looking at
C．Looked at
D．To be looked at
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