21.—I’ll do the washing-up. Jack, would you please do the floors?
—_______.
A．Yes, please B．No, I don’t C. Yes, sure D. No, not at all
22.There are over 58, 000 rocky objects in _______ space, about 900 of which could fall down onto _______ earth.
A．the; the B. 不填; the C．the; 不填 D．a; the
