单项选择题

He _________ over the beginning of a major build-up of agents, equipment and technology.

A．administered
B．presided
C．mastered
D．executed
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单项选择题
The makers and dealers first _________ to find out what the consumer wants to buy and then go about making it available for purchase.
A．conceive
B．contrive
C．endeavor
D．inquire
单项选择题
Another study found that _________ students with basic job information in high school was associated with higher earnings in the future.
A．acquainting
B．recognizing
C．acknowledging
D．identifying
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