I have two grammars, ______are of great use.

The boy was seen onthe sports ground.

Robots similar to real people were shown in America. I think there ___ fewer workers in factories in a few years.

The engineer hasspent one year working in the US and discovered how things ________overseas

Why is your father in such a hurry? — He _____ for Beijing to attend an important meetingThe plan _____ at six.