—Our math teacher stays in the office for a l...

—Our math teacher stays in the office for a long time every day．

—Yes，it________him a long time to check our homework．

A．costs

B．spends

C．takes

D．pays

九年级英语单项填空中等难度题查看答案及解析

—The light in the office is still on. Who__________it be? Our math teacher?

—No. it__________be him. I saw him in the classroom just now.

A.can; can’t B.may; must C.can; mustn’t

九年级英语单选题中等难度题查看答案及解析

Our math teacher______to our school at the age of 20 and she_______in our school for more than 30 years.

A. comes; taught　　 B. came; taught

C. came; has taught　　 D. has come; has taught

九年级英语单选题中等难度题查看答案及解析

Our math teacher ________ to our school at the age of 20 and she ________ in our　　　 school for more than 30 years.

A. comes；taught　　 B. came；has taught

C. came；taught　　 D. has come；has taught

九年级英语单选题中等难度题查看答案及解析

Our math teacher ________ to our school at the age of 20 and she ________ in our school for more than 30 years.

A. comes; taught　　 B. came; taught　　 C. came; has taught　　 D. has come; has taught

九年级英语单项填空中等难度题查看答案及解析

If you stay in space for a long time, will your body change? Mark Kelly and Scott Kelly from the United States will show you the answer.

Mark and Scott are twins. They are both retired(退休的）NASA（美国国家航天航空局）astronauts. From 2015 to 2016,Scott spent 340 days at the international space station, while Mark stayed on the earth. People took measures of both men before, during and after the flight. They were helping with a NASA project which studies how long-term space travel influences the human body.

The full results of the study will come out in a year or two. But scientists are sharing some findings in the journal Nature.

A change in appearance was easy to see. Scott, when he returned to the earth, was 5cm taller before. Another change was that Scott's eyesight declined after he came back. He found he couldn't see clearly. He also found that he couldn't move his legs so easily like before. Scientist found that after coming back to the earth, he took a little longer to understand things and make decisions.

There were also changes that were much harder to see. As someone grows older, his telomeres(端粒）get shorter and become less effective to stop DNA from getting damaged. But during Scott's stay in space, his telomeres got longer while Mark's kept getting shorter.

Further tests on the twins are still going on.NASA plans to send people to Mars in the 2030s,and the twins' research could help them prepare for those space trips.

1.Which of the following is Not true about Scott?

A.He has a twin brother. B.He is from the United States.

C.He has never been to space before. D.He was once a NASA astronaut.

2.We can know that scientists did the research between the twins in order to_______.

A.see who is a better astronaut.

B.learn more about the twins' daily life

C.study how twin brothers act diferently in life

D.study how long-term space travel influences the human body

3.What does the underlined word“declined”mean in Chinese?

A.下降 B.漂浮 C.提高 D.控制

4.What didn't Scott experience while he returned to the earth?

A.He couldn't understand others as well as before. B.He could walk faster than before.

C.His telomeres became longer. D.He grew taller than before.

5.The last paragraph mainly tells us ____________.

A.the fun of space travel

B.the success of the twins' research

C.the full results of the twins' research

D.the purpse of the twins' research

九年级英语阅读单选中等难度题查看答案及解析

The teachers hope all of us can hand _______ our homework _______ time every day.

A.up; in B.out; on C.on; in D.in; on

九年级英语单选题中等难度题查看答案及解析

The teachers hope all of us can hand _______ our homework _______ time every day.

A. up; in　　 B. out; on　　 C. on; in　　 D. in; on

九年级英语单选题中等难度题查看答案及解析

The teachers hope all of us can hand _______ our homework _______ time every day.

A. up; in            B. out; on                           C. on; in          D. in; on

九年级英语单项填空中等难度题查看答案及解析

The teacher hope all of us can hand ________ our homework ________time every day.

A.up，in B.out，on C.on，in D.in，in

九年级英语单选题中等难度题查看答案及解析