During the break time, students began to _____ out of the building.
A. restrain
B. spill
C. retreat
D. extend
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He said he had new evidence, but refused to _____ any further.
A. elaborate
B. collaborate
C. laborious
D. laboratory
As a teacher, you should not _______ the students from asking questions in class.
A. resolve
B. restrain
C. import
D. impose
Cautious people might feel more comfortable with a gradual rather than an _______change.
A. transparent
B. inferior
C. abrupt
D. scared
She was filled with ______when she entered the empty dark room.
A. panic
B. controversy
C. available
D. accustomed