--___do you clean the reading room?
---Every two or three days.
| A．How long | B．How far | C．How soon | D．How often |
We had wanted to finish our task by noon, but it didn’t quite ______．
| A．find out | B．give out | C．hand out | D．work out |
____you eat the correct foods _____be able to keep fit and stay healthy．
| A．Only if ; will you | B．Only if ;you will |
| C．Unless ; will you | D．Unless ; you will |
The local government has done everything it canthe buried miners．
| A．save | B．saving | C．to save | D．be saved |
It is difficult for a teacher to give attention to children in a large class．We should reform the situation in order to meet each child’s needs．
| A．private | B．personal | C．individual | D．single |
_____she forgets to bring a health certificate?
| A．What if | B．How about | C．What for | D．So what |