问题
选择题
—What makes her so frightened?
—Oh,it is the mouse that she______on her bed while looking for her watch.
A．came about
B．came across
C．came through
D．came up
答案
答案：B
考查短语动词的区别。come out“发生”；came across“发现，偶遇”；come through“度过，(电话)打通”；come up“被提出，发生”。