— Must I return the book tomorrow?
— No, you ________. You can keep it for three days.
A．mustn’t B．needn’t C．can’t D．may not
Three fourths of the ________ in the country have run out.
A．water B．book C．forests D．news
I don’t know _________ the problem.
A．how deal with B．how to deal with
C．what to deal with D．what do with
Hainan is a very good island. It’s the second ________ island in China.
A．largest B．large C．larger D．most large
The accident happened ________ a cold winter morning.
A．in B．at C．of D．on
— ________ fine weather it is today!
— Let’s go for a picnic.
A．What B．How C．What a D．How a
