单项选择题
He has to go to Canada for the next()of his training.
A.step
B.stand
C.point
D.stage
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产品生命周期理论认为对外直接投资应始于产品的()的时期。
A.创新
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单项选择题
Fifteen engines are scheduled for delivery this week,the remainder ()at a later date.
A.sends
B.to send
C.to be sent
D.sending
