when using ampere’s law, we have to know how much the current passing through the area enclosed by the chosen path is. how much is i（enclosed) in the figure？

Suppose we had a meal in a restaurant and the bill was 20 dollars, how much was the appropriate tip we would give to the waiter?

A．15 cents

B．35 cents

C．1 dollars

D．3 dollars

听力原文：M: Excuse me, how much does an ice cream cost?

W: Two yuan. And how many do you want?

M: Two, please.

W: Anything else you want to buy?

M: Oh, yes, I still want some bread. A piece of bread, please.

W: Here you are. 1.5 yuan a piece.

M: By the way, do you have any fruit here, such as apples or oranges?

W: I'm sorry we haven't got any.

M: All right. Here's the money for you.

W: Thank you.

Where does the dialog take place?

A．At home.

B．At a hotel.

C．In a store.

听力原文：W: Good morning. Can I help you?

M: Yes, please. I would like to know about the courses at this evening school.

W: Is that a summer course you're interested in?

M: Yes.

W: Well, we have short full-time courses during the summer.

M: Mm-mm, I would like to know how long one course lasts.

W: Yes. Each course lasts three weeks.

M: How many hours per week, please?

W: It's about twenty-three hours a week. Usually four and a half days each week.

M: You must have a lot of students in the class, haven't you?

W: We have a lot of students in the school, but in the classes only between twelve and fourteen students.

M: Could you please give me the dates of the first and second courses?

W: Yes, certainly. The first course begins on July 3 and lasts until July 20 and the second course is from July 24 until August 10.

M: OK. Thank you very much.

W: You're welcome.

Where does the conversation probably take place?

A．In the school office.

B．In a classroom.

C．At the student's home.

听力原文：M: When I say I live in Sweden, people always want to know about the seasons.

W: The seasons?

M: Yeah, you know, how cold it is in winter, what it is like when the days are so short.

W: So what is it like?

M: Well, it is cold, very cold in winter, sometimes as cold as 26 degrees below centigrade. And of course when you go out, you'll wrap up warm. But inside in the houses it's always very warm, much warmer than at home. Swedish people always complain that when they visit England, the houses are cold even in a good winter.

W: And what about the darkness?

M: Well, yeah, around Christmas time there's only one hour of daylight, so. you really look forward to the spring. It is sometimes a bit depressing, but you see the summers are amazing. From May to July, in the North of Sweden, the sun never sets. It's still light in the midnight. You can walk in the mountains and read a newspaper.

W: Oh, yeah, the land of the midnight sun.

M: That's right, but it's wonderful. You want to stay up all night. And the Swedes make the most of it. Often they start work earlier in summer and then leave at about 2 or 3 in the afternoon, so that they can really enjoy the long summer evenings. They like to work hard, but play hard too. I think Londoners work longer hours, but I'm not sure this is a good thing.

Questions 19 to 22 are based on the conversation you have just heard.

19. What do we learn about the man from the conversation?

20. What do Swedish people complain about when they visit England in winter?

21. How does the man describe the short hour of daylight around Christmas in Sweden?

22. What does the man say about the Swedish people?

(23)

A．He likes Sweden better than England.

B．He prefers hot weather to cold weather.

C．He is an Englishman living in Sweden.

D．He visits London nearly every winter.

Lately a lot about the affects of smoking and second-hand smoke has been reported almost weekly in the news and it's getting very good coverage (报道范围). But we still have parents smoking in front of new-born babies and all the way through their kids' lives.

For me personally, my mother and all my grandparents smoked. So no matter where I went I would inhale(吸入肺部) it. For the past year I've been trying to avoid my own MOTHER when she starts smoking...I feel angry because I've realized how much she is damaging everyone else's health in the house, especially her grandkids.

Now this is happening all over the world. What are parents thinking? They are ignoring the warning signs. Are they just to be selfish and don't care about their kids' health and other people's? Why should I move out of the area because of their bad habit? Shouldn't they have to go outside the room and do it?

What I'm saying is, SMOKING SHOULD BE BANNED AROUND CHILDREN! and it should be an offense to expose children to second-hand cigarette smoke.

When the adult smokes his/her life with children growing up near them, when they die, the children are left with the harm caused by the parent and potentially a bad later life with disease and worse health.

How often has the affects of smoking and second-hand smoke been reported in the newspaper?

A．Once a week.

B．Twice a week.

C．Once a month.

D．Twice a mouth.