A．purifyB．cleanC．dirtyD．contaminate

During the SARS period, it is especially important to ventilate the room.A．dustB．cleanC．re

A．freshB．costlyC．dirtyD．attractive

【12】A．clearB．cleanC．clearlyD．cleaning

The Great Hall is bright and spacious.A.pleasantB.cleanC.peacefulD.large

Last Sunday, Jane had the windows _________.A. cleaningB. to cleanC. cleaned

You must【 shine】 your shoes.A.lighten B.cleanC.wa