【题目】He ________ some of his old love letters in his wife's desk.
A.came out
B.came across
C.came about
D.came up

【答案】B
【解析】考查动词短语辨析。句意：他在妻子的书桌上偶然发现了一些旧情书。came out“出来”；came across“碰巧遇到，碰到发现”；came about“发生”；came up“到达，达到”。根据题意，故选B。