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- can we do to make the air clean? ( )-Planting more trees and walking to work.A.HowB.WhatC.WhereD.W

编辑:chaxungu时间:2026-04-11 01:02:33分类:小学英语题库

【题目】--- _____ can we do to make the air clean? ( )

---Planting more trees and walking to work.

A.HowB.WhatC.WhereD.When

【答案】B

【解析】