问题补充:
friend of my grandfather’s will come tomorrow. I’m wondering how old man he might be.
A. The; a
B. The; the
C. A; a
D. A; the
答案:
A. The; a
B. The; the
(答案→)C. A; a
D. A; the
解析:a friend of my grandfather’s意为“我爷爷的一位朋友”。这是一个双重所有格。由于man是第一次提及,因此也要用不定冠词。