This is the girls_I met in the street.
A. whom
B. that
C. thai
D. what
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There is somebody here who wants to speak to you.
A. 对
B. 错
This is the book which he lost yesterday.
A. 对
B. 错
Don't let it _into the hands of the enemy.
A. fall
B. fell
C. falling
D. falled
You will have a free debate _ a free discussion.
A. or
B. and
C. to
D. at