I don’t know whether you happen ____ it, but I’m going to study in the U.S.A. this September. A. to be heard B. to be hearing C. to hear D. to have heard
——We must thank you for taking the trouble to cook us a meal. ——____.
——Do you mind if I smoke? ——____
——So you missed the meeting. ——____. I got there five minutes before it finished.
____ from endless homework on weekends, the students now find their own activities, such as taking a ride together to watch the sunrise.
Young as he is, David has gained ____ rich experience in ____ society.