We must ___there quickly A.to walk B.walk C.walk to D.walking
问题描述:
We must ___there quickly A.to walk B.walk C.walk to D.walking
答
B
MUST:情态动词,后面跟动词原形,AD就死掉了
there:副词,直接跟动词walk,介词to就多余啦,就唯有B正确啦why