21. Japan has been trying to bring its nuclear crisis under ____ control, but ____ spread of radiation has raised concerns about the safety of the nuclear energy.

A. a; the                             B. the; /                       C. /; the                D. a; /

22. The new CRH train between Beijing and Shanghai ____ speed can reach about 380km/h will benefit ____ takes it.

A. whose; whoever        B. which; whichever     C. whose; who      D. where; whoever