The flat rent is expensive, I’ve got about half the space I had at home but I am paying ________ here.
| A．at twice much | B．as much twice | C．much as twice | D．twice as much |
The research is so designed that once _______ nothing can be done to change it.
| A．begins | B．having begun |
| C．beginning | D．begun |
After graduation she reached a point in her career __________ she had to decide what to do.
| A．that | B．what |
| C．which | D．where |
Edward, you play so well. But I ________ you played the piano.
| A．didn’t know | B．hadn’t known |
| C．don’t know | D．haven’t known |
Not until I began to work ________ how much time I had wasted.
| A．didn’t I realize | B．did I realize |
| C．I didn’t realize | D．I realize |
Little ________ about his own safety, though he was in great danger himself.
| A．does he care | B．did he care |
| C．he cares | D．he cared |