21. __ ___, the great mother, in order to save her sick child, kept waiting for four hours in the heavy snow.
A. It depends B. Take it easy
C. Believe it or not D. It is OK
22．－Do you know _____ famous singer, Maria Carey?
－I do know _____ Maria Carey, but not that one.
A.the; the B. the; a C.a; a D. a; the
