考点：expose vt．暴露；揭露；使曝光

　　Don't expose it to the sun． The magazine exposed the politician as a crook．

　　The film has been exposed．

　　归纳：expose常与介词to连用，构成词组expose sb／sth to...，含义是" "。

　　活学活用

　　________________to strong sunlight for a long time will do harm to our skin．

　　________________to the sun，rain and wind for a long time，the stone split．

　　4．Neither its cause nor its cure was underst00d．

　　Neither he nor I am going to attend the meeting．

　　cure n．治愈；痊愈

　　The drug should bring about a cure．/ The boy's cure took six days．

　　The doctors are trying to find a cure for that strange disease．

　　归纳：cure作"治愈；痊愈"讲时是 名词。

　　cure作为"治疗(办法)"讲时，是可数名词，常与介词for连用。

　　cure vt．治愈；治疗 I am sure the girl's wound will be cured．

　　活学活用

　　The fresh air on the island ________him________ his headache．

　　5．So many thousands of terrified people died every time there was an outbreak．

every time引导时间状语从句，意为"每当......"。类似用法的短语还有each time(每次；每当)，at the time(在......时候)，the last time(最后一次)，the first time(第一次)，next time (下一次)，the moment(--......就)等。

　　Every time we are in trouble，David comes to help us in time．

　　The last time I saw him，he was working in a shoe shop．

　　活学活用

　　1)He always brings me a pretty gift ______________ he comes to visit me．

　　2) ____________ I meet him，I always think of the things which happened between US．

3)I thought him handsome and honest _____________ I met him．