21. ---Do you mind if I record you lecture?
---_______. Go ahead.
A. Never mind B. No way C. Not at all D. No. You’d better not.
22. _______ I ask you to do something, you always say you’re too busy.
A. At times B. Some time C. By the time D. Every time
23. We are invited to a party ______ in our club next Friday.
A. held B. to be held C. being held D. holding
