单项填空 ——______ you free tomorrow?——Yes,I think so.A.Do B.Are C.Will D.Can

问题描述:

单项填空 ——______ you free tomorrow?——Yes,I think so.A.Do B.Are C.Will D.Can

选B,be free是空闲的或者免费的,变成疑问句把be动词提前,you为主语,所以用are