The research they had been devoted to ______ to be of great value to the cancer patients.
| A．is proved | B．proves | C．has proved | D．proved |
The building ______ next year will be a restaurant．
| A．having been built | B．to be built |
| C．being built | D．built |
---I fell off my bicycle and broke my leg yesterday．
---Is that ____ you drank too much？
| A．why | B．how | C．because | D．when |
_______ no buses , we have to walk home．
| A．There were | B．There being | C．It was | D．It being |
_______ to the left , and you will find the post office．
| A．Turning | B．Turn | C．To turn | D．Turned |
_______ many times , he still couldn’t understand it．
| A．Told | B．Having been told |
| C．He was told | D．Though he had been told |