单项选择题

______, you'd better keep it away from kids.

A．To be safe
B．being safe
C．That for safe
D．As be safe
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单项选择题
Time ______, I shall invite you to dinner tonight.
A．permitted
B．that permitting
C．is permitted
D．permitting
单项选择题
The chair ______ you are sitting is made of wood.
A．that
B．which
C．what
D．on which
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