A．HoweverB．WhileC．ThenD．Therefore

【C4】A．thatB．whileC．thenD．when

回答（56）题 查看材料A.howeverB.thenC.thoughD.therefore

【C4】A．howeverB．whileC．ifD．because

I was about to fall asleep______there was a knock at the door.A．asB．whileC．thenD．when

【C18】A．howeverB．moreoverC．neverthelessD．therefore

【C14】A．AndB．WhileC．ThenD．Or