I failed in the exam. But my mother ___ me to try again.

A. keeps moving B. kept encouraging

C. kept stopping D. keeps making

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—Which drink do you prefer, coffee or tea?

—I prefer coffee ______ sugar.

A. to B. than

C. better than D. with

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—I’d like to take five days off, Mr. Smith.

—______ . Don’t you know we’re very busy these days?

A. Never mind B. It’s OK

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Environment(環(huán)境) is very________，but you don’t understand the_______ of it，you always drop litter everywhere．

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Life is full of surprises and you never know how things will turn out .

Sir John Gurdon is a good example of this. As a boy, he was told he was hopeless at science and finished bottom of his class. Now, aged 79, the very same Gurdon shared the 2012 Nobe Prize in Medicine with Japanese stem cell(干細(xì)胞) researcher Shinya Yamanaka.

Like so many scientists, Gurdon shows us where the power of curiosity and perseverance (堅(jiān)持不懈)can lead.

At the age of 15 in 1948, Gurdon ranked last out of the 250 boys at his high school in biology and every other science subject. Gurdon’s high school science teacher even said that his dream of becoming a scientist was“quite ridiculous”.

In spite of his teacher s criticisms，Gurdon followed his curiosity and kept working hard. He went to the lab early and left later than anyone else. He experienced thousands of failures.

“My own belief is that we will, in the end, understand everything about how cells actually work,” Gurdon said.

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Luck favors the prepared mind Gurdon told the Nobel Prize Organization. “Ninety percent of the time things don’t work，but when they do，you have to seize(抓�。﹖he chance.”

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A. Ninety percent of the time things don’t work.

B. Luck favors the prepared mind

C. Life is full of surprises.

D. How to know cells actually work.

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