The two presidents agree with each other on the whole, but much remains______at the following meeting.
A.discussing
B.discussed
C.to discuss
D.to be discussed
网友回答
D解析此题考查非谓语动词的用法。remain为系动词，相当于be动词，该句主语much和discuss 之间存在被动关系，且从后面的at the following meeting 知道该动作是将要发生的，故选D，而不选B。