﹣Who is Dave looking ?﹣His mother. She’s been in hospital for a few days.A. for B. at C. after 题目和参考答案——青夏教育精英家教网—

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﹣Who is Dave looking _________?

﹣His mother. She’s been in hospital for a few days.

A. for B. at C. after

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—May I speak to Mr. Miller?

—Sorry, he ________________ to Sanya for a vacation.

A. goes B. has been C. has gone

Why not ________to Beijing for vacation?

A. consider going B. considering going C. consider to do D. to consider go

—Remember________the door when you leave the room．

—OK，I will．

A. to lock

B. locking

C. lock

D. locked

Harmful microbes (微生物) like bacteria (细菌), viruses (病毒) and other germs (病菌) are pathogens (病原体). They may enter your bodies and make you ill. The immune system (免疫系统) is the body’s defence (防卫) system that protects you from illness and disease caused by the pathogens.

The immune system is made up of non-specialized defences such as skin, tears and the acidic juice produced by the stomach, keeping you from the pathogens. It also has some highly specialized defences, which are different kinds of immune cells (细胞), grouped into phagocytes (噬菌细胞) and lymphocytes (淋巴细胞). Phagocytes are a type of white blood cell. They are swimming around in your blood stream, always on the lookout for antigens (抗原) —the pathogens that have entered your bodies. Whenever they see one, they will eat it. However, some antigens are hard to find and kill. Then lymphocytes, which are also white blood cells and the main types are B cells, T helper cells and T killer cells, will be the killers of the sneaky antigens. B cells, T helper and T killer cells work together to find and kill these antigens. B cells produce substances, called antibodies, which stick to the antigen. When that happens, it will tell the T helper cells to come over and either: 1. help the B cells kill the antigen, or 2. call the phagocytes or T killer cells to move in for the kill. Once a B cell or a T cell attacks an antigen, they create cells to “remember” it. Those “memory cells” hang out in your blood and if they see the same antigen again, they quickly recognize (识别) it so your immune system can act faster at killing it.

The immune system is more powerful than you probably imagine. Scientists from the University of Pennsylvania recently took immune cells from three patients with leukemia (白血病), then genetically changed them into “serial killer” cells to attack cancer cells. The study was small but the results were ground-breaking. The modified immune cells increased at least 1,000 times in the body and killed all the cancer cells. Therefore, more “memory cells” were created.

The immune system can be developed. Eating lean protein food (beef, beans) and food rich in vitamins A, C and E (sweet potatoes, carrots)，taking a 30-minute walk every day and reducing your stress levels, will help you achieve it.

1.The immune system can _________.

A. keep you from antibodies. B. protect you against antigens.

C. make your bodies weak and sick. D. help microbes enter your bodies.

2.How are the sneaky antigens found and killed

A. B cells produce antibodies to tell T helper and T killer cells.

B. B cells create “memory cells” to swim around in the blood.

C. Skin, tears, acidic juice and immune cells work together.

D. Phagocytes, B cells, T helper and T killer cells work together.

3.After a B cell or a T cell attacks an antigen, they create _________.

A. phagocytes B. lymphocytes C. memory cells D. serial killer

4.The underlined word “it” in the last paragraph refers to _________.

A. Less antigens can be killed by the immune system

B. The immune system can be changed into the “serial killer”

C. White blood cells act less quickly in the immune system

D. The immune system can be made more powerful

5.This article is mainly about _________.

A. the types of white blood cells B. an introduction to the immune system

C. a research report about human health D. the cause of illness and disease

﹣Did you catch the early bus this morning?

﹣Yes. The bus started to move _________ I got on it.

A. as soon as B. before C. though

﹣Are you going to have a part time job during the summer vacation?

﹣Yes. I think I shouldn’t always _________ my parents since I’ve grown up.

A. fight against B. hear from C. depend on

–President Xi a visit to three countries in Middle East from Jan.19 to 23.

–This was his first visit in 2016.

A. paid B. will pay

C. has paid D. is paying

It may be really hard to tell others that you’re feeling sad or worried. If you keep these feelings in your heart and don’t talk about them with others, you will even fall ill at last.

If you talk with someone, who cares a lot about you, like your dad or mom, you may feel better. You’re not alone with your problems or worries. But if a kid doesn’t want to talk with his or her Dad or Mom, what should he or she do? It’s better to find another trusty(可信的)adult ,like a teacher at school. Maybe this person can help you talk with your Dad or Mom about your problems.

Once you know who you can talk to, you should choose when and where to talk. If you think it’s difficult for you to say what you think, write it down on a piece of paper. If the person can’t understand what you mean right away, try to say it in a different way or give an example.

Some kids may feel shy about sharing their feelings. But it is important to share their feelings when they need help.

1.Is it good for people to keep feelings in the heart?

___________________________________________________________________

2.What can you do when you feel sad or worried?

___________________________________________________________________

3.What should a kid do if he or she doesn’t want to talk with his or her Dad or Mom?

___________________________________________________________________

4.How do some kids feel when they share their feelings?

___________________________________________________________________

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