The chairman thought _______ necessary to invite Professor Smith to speak at the meeting .
A.that
B.it
C.this
D.him
B
本句中it 作形式宾语,代替真正的宾语---不定式短语to invite Professor Smith to speak at the meeting .
The chairman thought _______ necessary to invite Professor Smith to speak at the meeting .
A.that
B.it
C.this
D.him
B
本句中it 作形式宾语,代替真正的宾语---不定式短语to invite Professor Smith to speak at the meeting .