Just take a try of our chocolate. The taste will ________ in your mouth!

In doing mouth-to-mouth breathing, you have to ______ .

A．open your mouth wide

B．take a deep breath

C．blow into his lungs

D．do' all of the above

听力原文：M: Open your mouth widely. I think we need to take it out.

W: Will it be painful?

M: it will be all right soon.

Where does the conversation take place?

A．At a drug store.

B．In a supermarket.

C．At the dentist's.

D．At the police station.

听力原文：M: Excuse me madam. Would you mind letting me take a look in your bag?

W: I beg your pardon?

M: I'd like to look into your bag, if you don't mind.

W: Who are you to insist? I advise you to take off, before I call a policeman.

M: I am a policeman, madam. Here's my identity card.

W: What? Oh... well... and just what right does that give you to go around looking into people's bugs?

M: None whatsoever, unless I have reason to believe that there's something in the bags belonging to someone else.

W: What do you mean belonging to someone else?

M: Well, perhaps, things that haven't been paid for?

W: Are you talking about stolen goods?

M: Exactly, but if the citizens are honest they wouldn't mind, would they?

W: Stopping people in the street and demanding to see what in their bags!

M: I'm sorry. I'm trying to do my job as politely as possible. However, I must insist on Being what you have in you bag.

W: And what, precisely, do you expect to find in there?

M: Thank you madam.

W: Net at all.

M: Mm. Sixteen lipsticks?

W: Yes, nothing unusual in that I like to change the eater with my mood.

M: I see you smoke a lot. Fifteen cigarette lighters!

W: Yes, I an rather a heavy smoker.

M: Now are you going to come along quietly or am I going to have to call for help?

W: But this is unfair!

(20)

A．A businessman in a store.

B．A wander in the street.

C．Amateur detective.

D．A man with plain clothes.

听力原文：M: Excuse me madam. Would you mind letting me take a look in your bag?

W: I beg your pardon?

M: I'd like to look into your bag, if you don't mind.

W: Who are you to insist? I advise you to take off, before I call a policeman.

M: I am a policeman, madam. Here's my identity card.

W: What? Oh...well...and just what right does that give you to go around looking into people's bugs?

M: None whatsoever, unless I have reason to believe that there's something in the bags belonging to someone else.

W: What do you mean belonging to someone else?

M: Well, perhaps, things that haven't been paid for?

W: Are you talking about stolen goods?

M: Exactly, but if the citizens are honest they wouldn't mind, would they?

W: Stopping people in the street and demanding to see what in their bags!

M: I'm sorry. I'm trying to do my job as politely as possible. However, I must insist on Being what you have in you bag.

W: And what, precisely, do you expect to find in there?

M: Thank you madam.

W: Net at all.

M: Mm. Sixteen lipsticks?

W: Yes, nothing unusual in that I like to change the eater with my mood.

M: I see you smoke a lot. Fifteen cigarette lighters!

W: Yes, I an rather a heavy smoker.

M: Now are you going to come along quietly or am I going to have to call for help?

W: But this is unfair!

(20)

A．A businessman in a store.

B．A wander in the street.

C．Amateur detective.

D．A man with plain clothes.

Do you realize that every time you take a step, the bones in your hip are subjected to forces between four and five times your body weight? When you are running, this force is increased further still. What happens if through disease a hip-joint ceases to be able to resist such forces? For many years hip-joints and other body joints have been replaceable either partially or completely. It is after all a simple ball and socket joint; it has certain loads imposed on it; it needs reliability over a defined life; it must contain materials suitable for the working environment. Any engineer will recognize these as characteristic of a typical engineering problem, which doctors and engineers have worked together to solve, in order to bring a fresh lease of life to people who would otherwise be disabled.

This typifies the way in which engineers work to help people and create a better quality of life. The fact that this country has the most efficient agricultural industry in the world is another good example. Mechanical engineers have worked with farmers and biologists to produce fertilizers, machinery and harvesting systems. This team effort has now produced crops uniformly waist high or less so that they are better suited to mechanical harvesting. Similar advances with other crops have released people from hard and boring jobs for more creative work, whilst machines harvest crops more efficiently with less waste. Providing more food for the rapidly increasing population is yet another role for the mechanical engineer.

According to the passage, when would most weight be imposed on hip-joints?

A．When one is walking.

B．When one is running.

C．When one is standing.

D．When one is lying down.