.
We separate the waste in our classroom to make it ________ .
A to reuse B reusing C reuses D to be reused
I _____ hope that every one of us will be successful in our studies．
| A．do | B．did | C．does | D．doing |
I’ll spend what I have _____ you a new coat．
| A．buying | B．bought | C．to buy | D．buy |
He ____ in the north, but now he ____ here．
| A．used to live; is used to the life | B．use to live; is used to live |
| C．used to living; is used to living | D．used to live; is used to live |
Better _____ all the lights are turned off before you leave the classroom．
| A．to be sure | B．to make sure | C．be sure | D．make sure |
After cutting down the tree, they _____ a little boat out of it．
| A．went on to make | B．went on making |
| C．went on with | D．continued |