单项选择题

— My God! I have to walk home now, for I just missed the bus. —That's too bad. You ______ it, had you set out a bit earlier.

A．should have caught
B．had caught
C．would have caught
D．could catch

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问答题

How can Mr．Smith get a special discount of 1.5% When his order is or more than______.

问答题

( )收入和支出 ( )但报价