单项选择题

Alone in a deserted house, he was so busy with his research work that he felt()lonely.

A. nothing but
B. anything but
C. all but
D. everything but

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单项选择题
From here people can see the bridge () construction.

A. below
B. by
C. under
D. essential
单项选择题
Speaker A: Can I borrow a pen, please Mine has run out of ink. Speaker B: ().

A. Sure, take it
B. Here you are
C. Of course, take it away
D. Thanks anyway
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