Before driving any bus,they will have to take a special test.

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• 1)The strike will last for a week .That’s what ( )people believe.a) most of b)the most of c)the more d) most 2)Before ( )any buses .they will have to take a special test.a) to drive b)drive c)driving d)they will drive3)One or two people have object ( )the students.a) at b) for c) to d) against
• Before driving any bus,they will have to take a special test.
• Before driving any bus,they will have to take a special test.Before在这里是介词还是连词?为什么?谢谢!
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