―Look! What a mistake! Why?
―Sorry, I _________ on it.
| A．don’t concentrate | B．hadn’t concentrated |
| C．haven’t been concentrating | D．wasn’t concentrating |
Would you ____ help me?
| A．mind to | B．be kindly enough to | C．be so good | D．be so good as to |
Why don't you do it ____ other way?
| A．by | B．with | C．some | D．any |
We must show concern ____ each other.
| A．with | B．for | C．at | D．to |
I ____ too much reading.
| A．am tiring | B．tired out because of | C．am tired out in | D．tired myself out with |
We hope that she will ____ soon.
| A．returns back | B．reach to home | C．reach for | D．pull through |