Carla can’t stand the boy ___ often plays jokes on her in front of the whole class.

A. which B. who C. what D. whom

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--Jack is helping Mum make a seafood soup in the kitchen.

--It’s surprising! He ______ helps with housework.

A. usually B. always C. sometimes D. seldom

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Can this small grey organ(器官) , which weighs less than one and a half kilos,

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So exactly how fast does your brain work? Well, imagine this: a bee lands on your foot. Neurons in your skin send this information to your brain at a speed of more than 240 kilometers per hour. Your brain then uses other neurons to send the message back to your foot to shake the bee off quickly. These neurons can send this information at more than 320 kilometers per hour. No computer has your hrain's unbelievable ability to deal with the amount of information coming from your eyes, ears and other sensory organs.

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B. are only found in your skin

C. send messages to your brain

D. need electricity to work

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B. show how fast they have become

C. say that computers have no abilities

D. ask people to use computers more

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A all the steps when your brain leams things

A. what an unbelievable organ the human brain is

B. how the brain makes people smarter than computers

C. the things you can do to make your brain work faster

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增加：在缺詞處加一個(gè)漏字符號(hào)（∧），并在其下面寫出該加的詞。

刪除：把多余的詞用斜線（\）劃掉。

修改：在錯(cuò)的詞下劃一橫線，并在該詞下面寫出改正后的詞。

注意：

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