He（ ）four lectures on modern philosophy, but he only gave two because of his illness.
A.正确答案Cwould give
B.had given
C.should have given
D.must have given
He（ ）four lectures on modern philosophy, but he only gave two because of his illness.
He（ ）four lectures on modern philosophy, but he only gave two because of his illness.
A.正确答案Cwould give
B.had given
C.should have given
D.must have given
