—How much do you know about the 3D film technology?
—A little. Not until ________ the hot movie Avatar 
________ some about it.
| A．did I see; did I begin to learn | B．I saw; I began to learn |
| C．I saw; did I begin to learn | D．did I see; I began to learn |
_______ 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 |
All their attempts to rescue the child from the burning building were ______．He dies soon afterwards．
A．in place B．in return C．in vain D, for
We offered these students a summer course , aimed _____ improving their spoken English．
| A．to | B．in | C．at | D．for |
England is rather short of arable land , so it is absolutely dependent upon other countries for her food __________．
| A．offers | B．stores | C．supplies | D．sales |