—When do you ________? —At four o'clock._爱下问搜题

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问题选择题

—When do you ________?

—At four o'clock.[ ]

A. leaving

B. leave

C. leaves

答案

答案：B

单项选择题

上颌第二前磨牙单根者比率约为( )

A．20%
B．40%
C．60%
D．80%
E．90%

问答题简答题

比较商业保险与储蓄的异同。