A hard-working man _____ become a great scientist, but a great scientist _____ be a hard-working man.

Don’t be angry with us. We ____ with you together, but we were busy with our final reports when you called in.

The weather in Inner Mongolia is always dry, but sometimes it _____ rain heavily. 

—____ you please tell me your name?—Sure. I’m Linda.

--- _______ I come back before 6 o’clock?---No，you _______．But you _______ be back later than 7 o’clock．