单项选择题

The crewman switched on portable flashlights as the engineer（）the scene.

A．has surveyed
B．surveys
C．was surveying
D．is surveying

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单项选择题
Henry and Tom（）to the parties at the Trade Union every Saturday.

A．used to go
B．were used to go
C．are used to go
D．use to go
单项选择题
（）the size and nature of a business, its main goal is to earn a profit.

A．Whatever
B．Whichever
C．Whereas
D．Because
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