21. It is known that water is not _____ endless resource, nor ______ that can be made once more.

A. the; £¯          B. an; that             C. an; one            D. £¯; one

22. At first he refused to admit he had stolen the car but when he was shown the videotape, he ____and admitted everything.

A.broke up                B broke away              C broke down             D broke out