If you want to go and see one of your American or English friends, you can do it after lunch.
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If you are invited to dinner by one of your English-speaking friends, you may bring the hostess some fruit as a present.
A. 对
B. 错
If you are a college student or a graduate student and meet during the break in an academic conference an American professor who is a friend of your supervisor’s, you can go over and have a talk with him as long as the break permits.
A. 对
B. 错
If you have a question to ask your foreign teacher of English, you may say goodbye to him and leave immediately after you have got the answer and expressed your gratitude.
A. 对
B. 错
If when you study at college in an English-speaking country you feel ill and therefore cannot attend the class, you'd better go and see the doctor and ask him to write for YOU a certificate for sick leave.
A. 对
B. 错