21．In the face of ________ failure, it is the most important to keep up ________ good state of mind.
A. /; a B. a; / C. the; / D. /; the
22．— Whom shall I give the document?
— To ________ is in the office. However, _______to require a written paper for it.
A. whom; make sure B. who; make sure
C. whomever; be sure D. whoever; be sure
23．My grandmother had________ over 50, 000 when she was sixty- five years old.
A. put away B. put back C. put out D. put down.
