【C2】A．BecauseB．WhileC．AfterD．When

【C4】A．thatB．whileC．thenD．when

【C7】A．BecauseB．ForC．WhileD．When

【C2】A．orB．whileC．butD．and

【C18】A．becauseB．whileC．whenD．if

【C12】A．becauseB．whileC．althoughD．so

【C5】A．becauseB．ifC．thoughD．when