【C15】A．destroyB．disturbC．mistakeD．misuse

【C12】A．destroyB．createC．maintainD．reduce

Dumped waste might contaminate water supplies.A．destroyB．decreaseC．delayD．pollute

Dumped waste might contaminate water supplies.A．destroyB．decreaseC．delayD．pollute

【C19】A．destroyB．ruinC．damageD．deteriorate

In the writers opinion, what problem affects microwave ovens？A．Children may misuse them.B．

Don’t_____ her.She is listening to the news now.A.disturbtoB.disturbC.disturbing