We Chinese are proud _______our great success _______the area of science and technology.

In some places women are expected to earn money _______ men work at home and raise their children.

I didn’t quite follow you. What was it ____ you just said about the subject?

Why not stop __________ a rest— Oh, it’s so exciting that I can’t stop ____________ the model plane.

How often do I need to feed the dog——It___food everyday, or it will be hungry.