When someone asks you to his or her home in the USA, it's very clear who the guest is and who the
host is. But invitation to restaurants are usually different. In many cases, it is the inviter who pays. But in
some cases, each one pays his or her own bill(账单). For example, when your friend says "Let's go and
get a beer," or "Want a cup of coffee?", it may be more of advice than an invitation.
Some people like taking their friends to a restaurant for dinner instead of having dinner at home. In this case, the host is expected to pay and the guest may leave the tip(小费). If you want to invite someone for a meal at a restaurant, tell him or her: "I'd like to take you to …".
There are also phrases that sound like invitations, but in fact they are not. People may say things like "We'll have to get together sometime," or "You'll have to come over and visit us sometime." They are the
expressions of saying goodbye. So you could answer "Yes, that would be nice," or "I'd love to," or
something similar.
1. If your friend asks you to a restaurant for dinner, you'd better _______.
A. have a free dinner
B. leave the tip
C. pay the bill
2. If someone says "Want a cup of coffee?", it may be more of ______.
A. a joke
B. advice
C. an invitation
3. Which of the following statements is an invitation?
A. We'll have to have a dinner together sometime.
B. Let's go to a sea-food restaurant and have a dinner.
C. I'd like to take you to have a dinner tonight.
4. The best title of this passage is "________".
A. Is it an invitation or advice?
B. Who will pay the bill?
C. Who will be invited?
,当OA=OB时，可知有两个B点，即
,,当OA=AB时，可知有一个B点，即
，当AB=OB时，可知有一个点
，因此符合条件的点B有4个.