Question

【题目】Look! A number of people ____ trees over there.

A. is plant B. is planting C. plant D. are planting

Answer 1

【答案】D

【解析】句意：看！那边有许多人在植树。根据“Look!”判断，句子的时态为现在进行时，其构成为am/is/are + doing，a number of=many，意思是“许多的，大量的”，后跟可数名词的复数，主语为复数形式，故答案为D。