—Hello, I’d like to speak to Henry. —Oh, which _______? There are two ______ in our office.

The passengers should wait in ________ when they want to get on the plane.

Usually a child’s behavior is a(n) ________ of his family environment.

At that time no one knew the ______of his picture. 

It is insisted that the One-China        should be the basis for the development of relations between the mainland and Taiwan.