—Kathy and her sister are so alike.—I can’t tell one from ____.
He__________ he would be able to leave tomorrow, but it's beginning to took difficult.
资料来源于《七彩教育网》http://www.7caiedu.cn—I put him down for a well-educated man.—___________ ?—I mean that he's a well-educated man.
I've visited a lot of different places and stayed in lots of different hotels, but none of them___________ this one.
—Look at these tracks. It __________ be a wolf.—It needn't be. It be a fox.
Travelers_______________ that they should bring their ID cards with them.