单项选择题

（）WAP technology, people can do their work anywhere anytime.

A．Use
B．Using
C．Being used
D．Used

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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
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
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