4. Watching the sunrise will cost every tourist $20 a night in the hotel on the top of the mountain, breakfast.
| A．included |
| B．containing |
| C．contained |
| D．including |
—Hi，Joan.Any idea where Tom is?
—He ________ on the playground.I saw him there playing football just now.
| A．shall be | B．should have been |
| C．must be | D．might have been |
—Guess what？I came first in that contest.
—Great！You ________ a lot during the past two weeks.
| A．must practise | B．should practise |
| C．should have practised | D．must have practised |
—Where will you start your work after graduation?
—Mum，it's not been decided yet.I ________ continue my study for a higher degree.
| A．need | B．must | C．would | D．might |
—Why do you look so puzzled?
—Oh，I ________ over a most difficult maths problem.
| A．thought | B．have thought |
| C．am thinking | D．think |
—Peter！Let's hurry.The boss is coming.
—Oh，I was afraid that we ________ her.
| A．miss | B．had missed |
| C．will miss | D．have missed |