1.He ___ Mr.Black.He is taller.(用can't,can't be,must,must be,don't have to,1.He ___ Mr.Black.He is taller.(用can't,can't be,must,must be,don't have to,needn't其中的一个填空,请说明一下选这个词的理由)2.You can _______ the teacher for help.(ask for 与 ask sb.to do应该是选一个填空吧)

问题描述:

1.He ___ Mr.Black.He is taller.(用can't,can't be,must,must be,don't have to,
1.He ___ Mr.Black.He is taller.(用can't,can't be,must,must be,don't have to,needn't其中的一个填空,请说明一下选这个词的理由)
2.You can _______ the teacher for help.(ask for 与 ask sb.to do应该是选一个填空吧)

1.第一个横线填can't be,这题要根据句子逻辑填,句子意思是:
他不可能是Mr.Black.因为他更高一点.
表示不可能只有can't be,而can't后面没有be的话就组不成一个句子
2.第二条横线填ask
ask sb to do和ask sb for ..都是固定词组搭配,由于句子后面有for,因此填ask