问题补充:
Yesterday I an old friend of mine at the shopping mall.
A. came up
B. came out
C. came across
D. came down
答案:
A. came up
B. came out
(答案→)C. came across
D. came down
解析:考查动词短语:A.came up提出,B. came out出版C. came across遇上,D. came down下来,句意:昨天我在超市遇到了一个好朋友。选C。