单项选择题

_______if I had arrived yesterday without letting you know beforehand

A．Would you be surprised
B．Were you surprised
C．Had you been surprised
D．Would you have been surprised
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单项选择题
______, I must do another experiment.
A．Be it ever so late
B．It is ever so late
C．It be ever so late
D．So late it be ever
单项选择题
At first the company refused to purchase the equipment, but this decision was_________revised.
A．subsequently
B．successively
C．predominantly
D．preliminarily
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