There is no time ,we must _____ there quickly(选择,并说明理由)A.to walk B. walk C.walk to D./

问题描述:

There is no time ,we must _____ there quickly(选择,并说明理由)
A.to walk B. walk C.walk to D./

C
must为情态动词,后直接加动词
there为副词,前不加介词
故A\C排除。
若选D则不能表达句子

B 情态动词后加动词用原型

B.must后接动词原形.there是副词,前面不加介词.

b情态动词后动词用原型