Bob never does his homework _________ Mary. He makes lots of mistakes.
| A．so careful as | B．as careful as |
| C．not as carefully as | D．as carefully as |
She said she had some trouble ___________ her homework.
| A．finish | B．finishing |
| C．to finish | D．Finished |
Our country _______ a lot in the last fifty years.
| A．will change | B．changed |
| C．changes | D．has changed |
My mother_______ if she ________her work this week．
| A．comes back；finishes |
| B．comes back；will finish |
| C．will come back；finishes |
| D．will come back；will finish |
There _____ an eraser, two books and three pens on the desk.
| A．have | B．are | C．is | D．be |
---May I play basketball ? --- No, you _____
| A．must not | B．may not |
| C．don’t have to | D．shouldn’t |