◆情态动词 can，must 与 have to 的用法一、用括号内所给词的适当形式填空1. I can't________ (play) chess with you. I have too much homework to do. 2. —Can your parents________ (speak) English?—Yes, they can. 3. What can your sister ________(do)?4. The boy works very hard. He ________(not wa...
