我弟弟在家里總是會(huì)被告誡別花太多的時(shí)間玩手機(jī)。(spend)

My brother ___________________________________________________mobile phones at home.

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________ (無(wú)論何時(shí)) I think of Grandpa, I feel warm.

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My mother is worried ________ my grandfather's health.

A.for B.with

C.about D.of

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________of (成千上萬(wàn)的)birds are flying in the sky when spring comes.

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C.For 12 hours. D.For 23 hours.

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(2018·山東臨沂)What was discovered by accident? The answer is penicillin (青霉素). It kills germs. By killing germs, it saves lives. Suppose you are sick. You go to a doctor. She examines you. She says you have a “staph” infection (葡萄球菌感染). She gives you some medicine. You take it. The medicine knocks out the staph. Soon you are well. Before penicillin, this would not happen. Staph was almost sure death.

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Dr. Alexander Fleming was working to kill the staph germ. He worked for years. One day he took a cover off a dish. He looked inside. There was a thick growth of staph germ. There was also some mold. Then he saw something strange. Where the mold was, there was no growth of staph. This is what Fleming probably thought. “By accident, I found a mold to kill the dreaded staph.”

This is how penicillin was found. But here’s the real miracle (奇跡). There are thousands of kinds of molds. But only one kind can kill staph. The mold must have fallen into the dish a few days before. The cover was probably off only a few seconds (秒). In those few seconds the right mold fell into the right dish. Another man might have thrown the dish away. But Fleming was very careful and smart. He understood what the mold did. How lucky the humans were!

根據(jù)短文內(nèi)容,選擇最佳答案

1.During the experiments to find a medicine for staph infections, ________.

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C. the careless person will miss valuable chances

D. luck is enough when doing scientific experiments

4.Most of this passage is written by ______.

A. telling an unusual story B. showing the results of experiments

C. offering some reasons D. giving some advice

5.This passage is mainly about ______.

A. medicine for a staph infection B. useful accidents

C. Dr. Fleming’s research D. discovering penicillin

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1.判斷正誤(“T”表示正確,“F”表示錯(cuò)誤);

A 3D printer at the top of the “Pod Vending Machine”skyscraper can help people print the pods they choose.

2.完成句子

Haseef said that vending machines________.

3.簡(jiǎn)略回答問(wèn)題: Why has Haseef Rafiei caught the world’s attention?

__________________________________________________________

4.找出并寫下第三段的主題句;

______________________________________________________

5.將文中畫線句子譯成漢語(yǔ)。

____________________________________________________________

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In the future, Sino-US climate cooperation _______________________.

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