---Where ________he go? ---I’m not sure, Madame. I think he said he had an appointment.
Our class discussed the question of __________it is necessary for us students to use mobile phones on campus.
—Peter, your hair is getting much too long. It’s high time you __________it cut.—OK. I will.
__________people relaxation and pleasure, but it can also increase their knowledge of any kind.
It was in the lab __________was in the charge of Professor Smith __________they carried out the experiment.
—Bad luck. My computer doesn’t work. —Why not turn to John? No one can match him in our class when it __________repairing computers.