单项选择题

In case he ______ before I get back, please ask him to wait.

A．would arrive
B．should arrive
C．arrives
D．arrived
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单项选择题
Even when she didn't know what she ______ about, she spoke more authoritatively than most people did.
A．talked
B．had been talking
C．had talked
D．would talk
单项选择题
Before taking such a test, one had better ______ his or her vocabulary.
A．outline
B．translate
C．revise
D．brush up
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