Question

The cleaners must prevent the street ______.

A．getting dirty

B．from dirty

C．from get dirty

D．from getting dirty

Answer 1

D

试题分析：prevent sb from doing sth预防，阻止某人干某事，from是介词后面接名词或者动名词。故选D，清洁工必须防止大街变脏。
点评：prevent sb from doing sth预防，阻止某人干某事，from是介词后面接名词或者动名词。