单项选择题

We must ______ the usual customs of the local people and arrange accordingly.

A．assert
B．certain
C．allege
D．ascertain
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单项选择题
A friendship may be ______ , temporary, situational, or deep and long - lasting.
A．superficial
B．superstitious
C．superior
D．supplementary
单项选择题
Evening was ______ as I took the road over Mountain Top.
A．setting out
B．setting in
C．setting down
D．setting off
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