The tomato is the world's most popular fruit. _______ the pumpkin, botanically speaking it is a fruit, not a vegetable.?

A. Just like     B. Just as     C. Such as      D. For example

A　


解析:

考查連詞與介詞的區(qū)別。just like意為“正?像……?一樣”，用來對比相似的事物，后常接名詞、代詞。just as意為“正像……一樣”，用來連接狀語從句。such as“像……一樣的”，表示部分列舉；for example“例如”，用來舉例。

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  Plants can’t communicate by moving or making sounds, as most animals do. Instead, plants produce volatile compounds, chemicals that easily change from a liquid to a gas .A flower’s sweet smell, for example, comes from volatile compounds that the plant produces to attract insects such as bugs and bees.

  Plants can also detect volatile compounds produced by other plants. A tree under attack by hungry insects, for instance, may give off volatile compounds that let other trees know about the attack, In response, the other trees may send off chemicals to keep the bugs away- or even chemicals that attract the bugs’ natural enemies.

  Now scientists have created a quick way to understand what plants are saying: a chemical sensor(傳感器) called an electronic nose. The “e-nose” can tell compounds that crop plants make when they’re attacked. Scientists say the e-nose could help quickly detest whether plants are being eaten by insects, But today the only way to detect such insects is to visually inspect individual plants. This is a challenging task for managers of greenhouses, enclosed gardens that can house thousands of plants.

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People have strange ideas about food. For example, the tomato is a kind of very

delicious vegetable. It is one of useful plants that can be prepared in many ways. It has rich nutrition and vitamin in it. But in the 18th century, Americans never ate tomatoes. They grow them in their gardens because tomato plants are so pretty. But they thought the vegetable was poisonous (有毒的). They called tomatoes “poison apples”.

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1.After you read the passage, which of the following do you think is true?

A．Americans never ate tomatoes after they began to plant them.

B．American didn’t eat tomatoes before the 19th century.

C．Even now Americans don’t eat tomatoes

D．In the 18th century Americans ate a lot of tomatoes.

2.The passage tells us that Jefferson was a President who learned to love the taste of tomatoes.

A．while he was in Paris .

B．when he was a little boy.

C．the President ’s cook.

D．the President’s wife.

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A．the President himself.

B．A French cook

C．the President ’s cook

D．the President’s wife

4.The underlined word “cook”in paragraph2 means_______

A．廚房             B．廚師             C．廚具             D．做飯

5.From the passage we know all the honored guests invited by Jefferson were______.

A．people from other countries               B．from France

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