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A.Don'tB.NoC.Mustn'tD.Won't

-He____in the kitchen.

A.cookB.is cookingC.cookedD.cooking

-In the park.

A.WhereB.WhenC.WhatD.How

A.deliciousB.goodC.awfulD.boring

-I get up _____ seven o'clock.

A.atB.onC.inD.to

A.IB.ItC.SheD.He

（_____） Because trees help make the air clean.

（_____） Good idea!

（_____） And we can plant more trees.

（_____） Why?

（_____） Yes. But what can we do?

（_____） We can put rubbish in the bin.

（_____） Look! There’s a lot of rubbish in our city.

A.littering; cleanB.throw; dirtyC.throws; messyD.throwing; messy

A.putB.putsC.puttingD.will put

A.throwB.throwingC.to throwD.throws