The students found _______ easy to work out this maths problem.
| A．it | B．this | C．that | D．him |
---Will there be more trees?
--- ______. I think we’ll have a more beautiful world in the future.
| A．Yes, there are | B．Yes, there will |
| C．No, there aren’t | D．No, there won’t. |
—Excuse me! Look at the sign __________ on the wall, please.
—Sorry. I won’t take photos any more. 
—Mary can't help ______ the house. Why?
—Because she is busy______ a hotel reservation.
A. cleaning; makingB.to clean; makingC. cleaning; to make
—Sorry, I can’t go to the theater with you ____ next Saturday, because I have ____ homework to do.
—It doesn’t matter.
A. on; too muchB. /; much too C. /; too much
一_______ will the foreign students be back from Tibet?
一In two weeks．I think．
A. How soon B. How far C. How long