| C 考察介词的用法
19. “Which do you want, the red one or the black one?”
“_____. How about showing me another?”
A. Either B. Both C. Neither D. None
C 考察不定代词的用法
20. “what makes her so unhappy?”
“____ one of her favorite books.”
A. Because she lost B. Because of her losing
C. She lost D. Her losing
D考察动名词的用法