—Who's the man talking to our teacher?—A professor __________ a visit to our school.
— Could you help me with my English?— _____________.
to take my English textbook, I had to borrow one from a schoolmate.
It was the news _________ he got the first prize ________ made his father excited.
My sister was against my suggestion while my brother was _________ it.
He ________ his position because he had been offered a better job.