21．－It’s said that scientists have made ___ _ big breakthrough in the cancer treatment.
－If so, many people can have been brought back to ____ life!
A. a; / B. /; a C. the; the D. a; the
22. The poor man with his two children ________ in a street corner.
A. was seen begging B. were seen beg C. was seen beg D. were seen begging
23.Everyone in the class hoped that he ____ after a few days’ treatment.
A. picked up B. took up C. gave up D. made up
