21. ______ recent research report published by the UN indicates that it is quite possible that ______ earth’s temperature is rising well above ______ previous estimate.

A. The; the; a  B. A; an; the   

C. A; the; the   D. A; the; a

22. Your words may give him a ______ against you, so you should be careful when you talk to him.

A. handle   B. gesture   

C. fight    D. suggestion