It's rather difficult for me to make such a _______ (decide).
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They stopped ________ (talk) when the teacher came in.
He suddenly remembered that his schoolbag_____ at home.
A. has been forgotten
B. had been forgotten
C. has been left
D. had been left
He must be an honest boy, ____ can be seen from his behavior.
A. that
B. what
C. which
D. when
She should take care that she has not ____any detail in the design.
A. disappear
B. neglected
C. thrown
D. delivered
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