When our ancestors were hunters and gatherers 10,000 years ago, they didn’t have time to wonder much about ________ but finding food.
A．everything B．anything
C．nothing D．something
His wife was busy cooking while he watched TV ________ comfortably in the sofa.
A．seat B．to seat C．seating D．seated
Don’t you think the world would be an easier place to live in, if we all ________ the same language?
A．speak B．had spoken C．spoke D．would speak
Knowing ________ you’re good at and doing even more of it creates excellence.
A．where B．which C．what D．that
It is a wise father ________ knows his child.
A．that B．which C．what D．whom
—May I smoke here?
—Choose a seat in the smoking section, if you ________.
A．should B．must C．can D．may
