求中英文翻译,最好有划词对应

求中英文翻译,最好有划词对应
If someone asks if you are free at a certain time and invites you to an event, you are not required to commit yourself until you know what the invitation is for. For example, if you say that you’re free and the invitation turns out to be something you’d hate to do (a trip to a local sight you’ve seen ten times), then you will be in a position to take back your acceptance or invent an excuse later.If this happens, tell the person who invites you that you have to check and that you’ll tell him or her later. If an invitation must be refused, most people expect a reason. The following sequence would be appropriate: apology, reason for refusal, thanks for the invitation.
When someone asks you to his or her home, it is very clear who is the guest and who is the host, but invitations to restaurants for lunch, dinner, coffee, a drink, etc., sometimes present problems, and the customs vary in different parts of the United States.