_____ three influenza type A virus subtypes(子类型) have been found in pigs.
| A．By far | B．As far as | C．So far | D．Till far |
Our football team will never take the defeat ____ down.
A. sitting B lying C. going D. climbing
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 |