—Did you look up the time of trains to Shanghai? —Yes, the earliest train is _____ to leave at 5:30 am.

In a shop ___ customers.

What’s the noise ? It sounds as if it comes from upstairs.   --______. It must be the window-cleaner working , next door.         

 The bookstore has sold _______children’s books as they did last year.

I often visit my parents, who live in the countryside  whenever ____.