There are more than fifty proposals ____ at the conference.
A)
discussed
B)
to be discussed
C)
discussing
D)
having been discussed
出自：华北水利水电大学-水利水电工程-大学英语（3）
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There are more than fifty proposals ____ at the conference.
A)
discussed
B)
to be discussed
C)
discussing
D)
having been discussed
出自：华北水利水电大学-水利水电工程-大学英语（3）