Most birds find it safe to sleep in the trees, but ________they have eggs or young chicks, they don’t use a nest.
There will be a large number of people attending the lecture______today’s paper.
I want to buy a pair of new trousers to ___ my sweater.
There goes the bell for the class.Let’s stop___.
--Must we hand in our homework now?---No, you ___. You ___ hand them in before Friday.
When I was walking in the street, I heard my name ___.