--- “What will you do during the summer holiday?”
--- “I don’t know, but it’s high time _____ something.”
A．I’m deciding B．I’ll decide C．I decided D．I decide
It is important that we _____ wild animals.
A．will protect B．should protect C．shall protect D．are protecting
The teacher demanded that the exam _____ before eleven.
A．must finish B．would be finished C．be finished D．must be finished
— I think I’m going to die.
— , Joe. You only have a cold.
A．Don’t mention it B．Take it easy C．It’s hard to say D．Take care
It is already 10 o’clock. I wonder how it ______ that she was two hours later on such a short trip.
A．came over B．came out C．came about D．came up
--Why does the lake smell terrible?
---Because large quantities of water ______.
A．have polluted B．is being polluted
C．has been polluted D．have been polluted
