问题

eir marketing plans succeed, they____ their sales by 30 percent.

A:will increase
B:have been increasing
C:have increased
D:would be increasing

正确答案是：

同类题型

I was about to inform you of the sudden change ______an unexpected visitor came.

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He had promised to come and help us, and ___

_______the door, please.—Come in please. The door _______.

Can I help you—Yes, please. I would like ________.