______the students clean their classroom every day yes,they clean_英语解答

______the students clean their classroom every day yes,they clean them after school
A.Do
B.Are

人气：219 ℃　时间：2019-08-20 03:14:34

解答

Awhy?clean 是动作动词的原形，加上do这个助动词，共同做了谓语动词，do提前后，句子变为一般疑问句；而are clean是两个动词原形连用，语法是不允许的，没有这种时态。