问题
选择题
.
They thought about it for a long time, but still couldn’t ________ a solution.
A．come over
B．got along with
C．came out
D．come up with
答案
答案：D
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.
They thought about it for a long time, but still couldn’t ________ a solution.
A．come over
B．got along with
C．came out
D．come up with
答案：D