Does the way you thought of ________ the water clean make any sense?
| A．making | B．how to make | C．to make | D．having made |
_____ underground for 2 years, David says the worst thing is not the danger but the darkness.
| A．Working | B．Having worked |
| C．To have worked | D．Worked |
She ____ have left school, for her bike is still here.
| A．can’t | B．mustn’t | C．needn’t | D．shouldn’t |
According to our school rules, no student ____ be permitted to carry mobile phones in class.
| A．will | B．must | C．may | D．shall |
You have no idea what I have had to _____ during the last few months.
| A．put through | B．go through |
| C．read through | D．look through |
The woman told the workers that her house _____.
| A．required to paint | B．required painting |
| C．requires paint | D．requires being painted |