问题补充：
The teacher asked a very difficult question. It was Ted who finally a good answer.
A. came up with
B. kept up with
C. came up
D. caught up with
答案：
(答案→)A. came up with
B. kept up with
C. came up
D. caught up with
解析：句意：老师问了一个很难的问题，是Ted最终想出一个不错的答案。came up with想出；kept up with赶上；表示并列；came up走近、长出、发生；caught up with赶上，由后往前。结合句意，选A。
考点: 考查动词短语的用法。
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