The visiting professor gave us some advice, ____ of great help to our English learning.
He told us whether __________ a picnic was still under discussion.
Rather than _________ at home, he always prefers ________ out to play.
I’m going to visit the factory ________ your brother worked a few years ago.
The number of people who _______ invited to the meeting _____ fifty, but a number of them _____ absent for different reasons.
--- Do you want another drink? --- __________.