Charles is now an actor. ______（give)half a chance I would have been the same.

Charles regretted _____ the TV set last year .The price has now gone down.

A. buying

B. to buy

C. of

D. from

Charles regretted () the TV set last year . The price has now come down.

A. buying

B. to buy

C. of

D. from

Charles regretted()the TV set last year.The price has now come down.

A. to buy

B. buying

C. of

A.to buy

B.of

C.from

D.buying

A、buying

B、buys

C、to buy

D、baught

听力原文：M: Hi. I have a reservation for tonight.

W: And your name？

M: It's Nelson. Charles Nelson.

W: Okay. Mr. Nelson. That's a room for five, and...

M: Excuse me？ Do you mean a room for five dollars？ I didn't know the special was so good.

W: No, no, no. According to our records, a room for five guests was booked under your name.

M: No. No. Hold on. There must be some mistake.

W: Okay. Let's check again. Okay, Mr. Charles

C.Nelson for tonight....

M: Ah. There's the problem. My name is Charles Nelson, not Charles C. Nelson. You must have two guests under the name.

W: Okay. Let me check again. Oh. Okay. Here we are. Charles Nelson. A room for one for the 19th....

M: Wait, wait! It was for tonight. Not tomorrow night.

W: Hum. I don't think we have any rooms for tonight. There's a convention going on in town, and uh, let's see. Yeah, no rooms.

M: Ah come on! You must have something. Anything.

W: Well. Let me check my computer here. Ah! There has been a cancellation for this evening. A honeymoon suite is now available.

M: Great. I'll take it.

W: But I'll have to charge you two hundred fifty dollars for the night.

M: Ah. I should get a discount for the inconvenience.

W: Well. The best I can give you is a ten percent discount plus a ticket for a free breakfast.

M: Hey. Isn't the breakfast free anyway？

W: Well, only on weekends.

M: Okay. That'll be fine.

(20)

A．The hotel clerk confused him with another guest.

B．Rooms were overbooked for that evening.

C．There were no more rooms available for five people.

D．The price for the room was higher than he expected.

started at Windsor Castle,one of the homes of the Royal Family,so that the Royal children could see the runners leave.The race was planned to continue for 26 miles 385 yards (42,195 metres),now the accepted distance for this race,into Central London.Because of the great heat,however,many runners had to give up before they could finish the race.Towards the end,the large crowd waited with great excitement for the South African,Charles Hefferon,to come into the stadium first.They were surprised,however,when the 1st man to appear was the small Italian,Pietri Dorando.Dorando was by now extremely tired and weak and,as he was running round the stadium towards the finishing line,he fell to the groud,unable to continue.Doctors rushed to help him and he soon got to his feet and continued,with loud cheers from the crowd.As he came close to the line he had to be helped again, this time by a journalist,but finally he finished the race.He was not,of course,allowed to receive the gold because he had had help during the race.Afterwards, Dorando argued unsuccessfully that he had not asked for this help.But the medal was given to an American,Hayes,who had finished second.However, Dorando later received a special gold cup from Queen Alexandra for his courage.

问题：a good title for the passage is ()

A、Dorando,hero of the Olympics

B、Dorando,the fastest runner

C、A Marathon race held on a hot day

D、who was the 1st runner？

。现在利用斯塔克博格模型来分析如果两厂商之一在另一厂商之前先作产量决策将会发生什么情况。

(1)设厂商1是斯塔克博格领袖(即在厂商2之前作它的产量决策)。找出反应曲线，使得各厂商能够根据它的竞争者的产量，求出它自己应该生产多少。

(2)各厂商将生产多少，以及利润为多少？

This exercise is a continuation of Exercise 3. We return to two firms with the same constant average and marginal cost, AC=MC=5, facing the market demand curve Q₁+Q₂=53-P. Now we will use the Stackelberg model to analyze what will happen if one of the firms makes its output decision ahead of the other one.

a, Suppose Firm 1 is the Stackelberg leader (i. e. , makes its output decisions ahead of Firm2). Find the reaction curves that tell each firm how much to produce in terms of the output of its competitor

b. How much will each firm produce, and what will its profit be？