【C9】A．atB．theC．howD．when

【B5】A．thatB．whatC．howD．when

【C10】A．theirB．theC．thoseD．these

【C4】______A．oneB．theC．other

【C2】A．aB．theC．someD．certain

You should avoid ______when you join them for the first rehearsal.A．from being mocked atB．

She bought a bicycle, but when she rode on it one of ______ wheels came off.A、aB、theC