______ eggs do you need for the soup — Well,one is probably.

It was about 600 years ago _______the first clock with a face and an hour hand was made.

You seem in low spiritsAnything wrong?—– I ______ in the important examI let my parents down

I ________ an engineer when I grow up.

The famous actor Chen Daoming once said, “As an actor, you _______ never be too hard-working.”