问题补充：
—Uncle Tom is an old friend of . I want to see him.
—OK. He will be here .
A. my father; in half an hour
B. my father; for half an hour
C. my father’s; in half an hour
D. my father’s; for half an hour
答案：
A. my father; in half an hour
B. my father; for half an hour
(答案→)C. my father’s; in half an hour
D. my father’s; for half an hour
解析：句意：汤姆叔叔是我的老朋友中的一位。我想去看看他。--好吧，他会在半个小时后回来。这里my father’s= my father’s friends;in+时间段表示过了多长时间后。故选C。
