In our class, when the bell rang and the teacher closed his book, it was a ____ for everyone to stand up.

A. signal　 B. chance　 C. mark D. measure

 

A

句意: 在課堂上, 鈴聲響起, 老師合上書就是我們要起立的信號(hào)。signal信號(hào), 導(dǎo)火線; chance機(jī)會(huì), 運(yùn)氣; mark分?jǐn)?shù), 標(biāo)志; measure措施, 辦法, 尺寸。又如: This is a signal that you are breaking down.這是你身體逐漸變垮的信號(hào)。The signal that the war broke out between two countries is oil.兩個(gè)國(guó)家爆發(fā)戰(zhàn)爭(zhēng)的導(dǎo)火線是石油。

 

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科目：高中英語 來源：河北省邢臺(tái)一中2011－2012學(xué)年高二下學(xué)期第四次月考英語試題 題型：053

根據(jù)短文內(nèi)容，從短文后的選項(xiàng)中選出能填入空白處的最佳選項(xiàng)，選項(xiàng)中有兩項(xiàng)為選項(xiàng)．

Ea sy Way s to Keep Your Brain Sharp

　　Everyone i s forgetful, but a s we age, we start to feel like our brain s are slowing down a bit-and that can be a very annoying thing．　　1　　 Read on for some technique s worth trying．

　　1．　　2　　

　　People who regularly made plan s and looked forward to upcoming event s had a 50 percent reduced chance of Alzheimer' s di sea se(老年性癡呆癥)， according to a recent study．　　3　　 Something a s simple a s setting a goal to have a weekly coffee date with a friend will do．There' s evidence that people who have a purpo se in life or who are working on long or short-term goal s appear to do better．In other word s, keep your brain looking forward．

　　2．Go for a walk．

　　Mildly rai sed glucose(葡萄糖)level s can harm the area of the brain that help s you form memorie s and phy sical activity can help get blood glucose down to normal level s．In fact, exerci se produce s chemical s that are good for your brain．　　4　　

　　3．Learn something new．

　　Take a Spani sh cla s s online, join a drawing club, or learn to play card s．A study found that mental stimulation limit s the weakening effect s of aging on memory and the mind．But the be st thing for your brain i s when you learn something new and are phy sically active at the same time．　　5　　 Or you can ju st go dancing with your friend s．

A．Focu s on the future．

B．Thi s can be e specially harmful to the aged．

C．It should be something like learning gardening．

D．So take a few minute s each day to do some reading．

E．But don't worry if our schedule i sn't filled with life－changing event s．

F．Luckily, re search show s there i s a lot you can do to avoid tho se moment s．

G．In other word s, when you take care of your body, you take care of your brain．

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