6. 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
7. --- I’m not feeling fit, Miss Green.
--- Just a cold. _______, and you’ll be well in a week.
A. Take it easy B. Don’t mention it C. It depends D. No trouble at all
