—_________ we keep the room clean enough all the time? —No, you _________.

A.Must; doesn't have B.Do; don't have to

C.Must; don't have to D.Must; mustn't

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Most teens need about 8 to more than 9 hours of sleep each night.The right amount of sleep is necessary for anyone who wants to do well in a test or play sports without tripping over their feet. Unfortunately,though,many teens don’t get enough sleep.

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Why is sleep important? Sleep deficit affects everything from a person’s ability to pay attention in class to his or her mood.Research shows that more than 20% of high school students fall asleep in class,and experts have been able to tie lost sleep to poorer grades.Lack of sleep also damages teens’ ability to do their best in sports.Slowed responses and less concentration(專注)caused by sleep deficit don’t just affect school or sports performance,though.Lack of sleep slows reaction time,which can be life threatening for people who drive.The National Highway Safety Traffic Administration reports that 1,500 people are killed every year in crashes caused by drivers between the ages of 15 and 24 who are simply tired.Lack of sleep has also been linked to emotional troubles, such as feelings of sadness and depression.Sleep helps keep us physically healthy,too,by slowing our body’s systems enough to re-energize us after everyday activities.

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D.To give teens advice on possible ways of having better sleep.

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A baseball bat

¥7

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¥6

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¥12

A brown hat

¥11

A tape player

¥19

An orange hat

¥13

Bill的學(xué)校要在圖書(shū)館舉行義賣(mài)活動(dòng),為此他準(zhǔn)備了很多東西,假如你是Bill,請(qǐng)根據(jù)圖表中的物品和價(jià)格,寫(xiě)一則英文廣告。

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2.不得出現(xiàn)真實(shí)的人名和校名.

3.詞數(shù):60詞左右。開(kāi)頭和結(jié)尾己給出,不計(jì)入總詞數(shù)。

Come and buy what you need at Bill's great sale!

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