There are over 58,000 rocky objects in （ ） space, about 900 of which could fall down onto （ ） earth.
（A）the; the
（B）/; the
（C）the; /
（D）a; the
What （ ） pity that you couldn't be there to receive （ ） prize!
（A）a; a
（B）the; a
（C）a; the
（D）the; the
The most important thing about cotton in history is （ ） part that it played in （ ） Industrial Revolution.
（A）/; /
（B）the; /
（C）the; the
（D）a; the
