you must teach the girls--- a.how to danceb.what to dancec.which to dance选项是ashe was very tired,so she-----very soon on the sofaa.went to bedb.sleptc.fell asleepd.asleep选项是c理由是？you must teach the girls--- a.how to danceb.what to dancec.which to dance选项是a 因为【dance是不及物动词】，不能有what或which这样的代词做dance的宾语she was very tired,so she-----very soon on the sofaa.went to bedb.sleptc.fell asleepd.asleep选项是c她非常累，因此她倒在沙发上很快就【睡着了fell asleep】。