Most birds find it safe to sleep in the trees, but _______they have eggs or young chicks, they don’t use a nest.
He looked around and caught a man _______ his hand into the pocket of a passenger.
The shop doesn’t open until 11 am, _______ it loses a lot of business.
— Beijing or Shanghai? What did you mean? — We were talking about _______ go to college.
When he was a boy, he used to go there and watched _______.
Robert is said______ abroad, but I do not know what country he studied in.