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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