单项选择题

We have to learn ______ technology from other countries.

A. advance

B. advancing
C. advanced
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单项选择题
No one should enter the spot without the ______ of the police.
A. permit

B. permission
C. permitting
单项选择题
Letting that animal escape was no accident; you did it ______.
A. intend

B. intentionally
C. intentional
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