Do you think teenagers should be allowed to drive–____________.Because teenagers aren’t serious enough.

It was announced that only when the fire was under control ____to return to their homes. [ ]

You can________ the cake ______ten pieces.

The two nurses ________ 100，000 yuan by the police but donated it to victims ofthe explosion

yan is a/an _______ secretary in our office, forhe is able to do tasks successfully, without wasting time or energy.