5.Students ______ nine hours a day.A.sleeps B.sleep C.are sleep

问题描述:

5.Students ______ nine hours a day.A.sleeps B.sleep C.are sleep

答案:B
这里的主语是students,是复数名词,动词用原形,而答案C be动词后面不能接动词原形,所以排除.
句意:学生每天睡九个小时.