21．It is clear that ________ little money the invention will bring him can hardly support so large ________ company.
A．/; the B．a; the C．a; / D．the; a
22．This sweater fits me, but I can't afford to buy ________. I have to choose ________ which is cheap enough for me.
A．it; that B．that; it C．it; one D．that; the one
