My father seems to have a natural gift _____ treating frostbites(冻伤). ______ , he is able to cure it.
| A．at; however serious a frostbite is |
| B．for; whatever serious a frostbite is |
| C．with; however a frostbite is serious |
| D．for; however serious a frostbite is |
Across from the KFC_________a big supermarket whose business is taking off recently.
| A．stand | B．is standing |
| C．which stands | D．stands |
On September 8th, Obama, President of America, made an inspiring speech at the school opening, which has left a lasting ___________ on the audience.
| A．expression | B．conclusion |
| C．impression | D．information |
John’s quick action shows that ________ knowledge of first aid can makereal difference in saving a person’s life.
| A．a; the | B．a; a |
| C．/; the | D．the; a |
-----“________, sir?” -----“No. Go ahead.”
| A．May I use your dictionary |
| B．Do you mind if I use your bike |
| C．Would you mind opening the window |
| D．May I have a look at your new book |
In the environment area, there is a system ________ the waste is disposed of by using the principles of ecology.
| A．in which | B．which |
| C．on which | D．that |