问题
选择题
What Mr. King said is a big problem _____ at the next meeting. [ ]
A. to discuss
B. to be discussed
C. discussing
D. to have discussed
答案
答案：B
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What Mr. King said is a big problem _____ at the next meeting. [ ]
A. to discuss
B. to be discussed
C. discussing
D. to have discussed
答案：B