—What do you think of a bus tour in London? —I think it would be great fun , but make sure you have a copy of the city’s travel____with you .
Human beings are different from animals _________ they have languages.
At school, some students are active, ______ some are shy, yet they can be good friends with one another.
___________ seems hard to believe is that the bird the officer uses is the same bird often seen in public parks----the pigeons.
I’d appreciate _______ if you could let me know in advance whether you will come or not.
It was after he had read the requirements _______ Mr. Black realized the task was too difficult to be finished.