These days some young people just ________ work hard because they have got used to the easy life provided by their parents.

I got close enough to hear them speaking Chinese, and I said “Ni Hao ” just as I ____ do in China.

John, look at the time. ____ you play the piano at such a late hour?

Henry _____be at home because he phoned me from his office just now.

The lady ________ have done something wrong, because she is looking guilty.