问题
单项选择题
We are sure that scientists will ______ a way to solve the difficult problem.
A. put up
B. come up with
C. look up
D. come up
答案
参考答案：B
解析： 考查动词短语辨析。put u p“张贴、搭建”；come up with“‘想出(主意)”；look up“查找，翻阅”；come up“出现”。根据后面的“a way to solve the difficult problem”可知应选B，意为“想到一个解决难题的办法”。