He didn’t make clear when and where the meeting would be held.
A. this
B. that
C. it
D. these
网友回答
A. this
B. that
(答案→)C. it
D. these
解析：it作形式宾语,when and where the meeting would be held作真正的宾语。当复合宾语中的宾语是宾语从句时,往往把宾语放在它的补语的后面,而用先行代词it放在全句谓语动词和宾语补语的中间。放在宾语补语后面的宾语是真正的宾语,放在全句谓语动词和宾语补语中间的it是形式宾语。