______ he is doing an operation on a patient; please don’t disturb him.
| A．Right away |
| B．Right now |
| C．In no time |
| D．At once |
Since Jerry is absent today, let’s get someone else to ____ the work where it was left off yesterday.
| A．take in | B．take down | C．take up | D．take off |
The girl cycled round the corner so quickly that she lost her ____ , fell off and hurt her legs seriously.
| A．patience | B．control | C．balance | D．touch |
____ I can see, there is only one possible way to keep away from danger.
| A．As long as | B．As far as | C．Just as | D．Even if |
Most students think this book is useful as it ____ all the basic grammar rules they need to know.
| A．deals | B．covers | C．says | D．teaches |
--- I apologize for not being able to join you for dinner.
--- ______.
| A．Go ahead | B．Not to worry. |
| C．That’s right | D．Don’t mention it. |