—When ________ the telephone ________?
—In 1876.
A. is; invented
B. did; invented
C. was; invented
The boy was made _____ the new words twenty times.
| A．wrote | B．writing |
| C．to write | D．written |
Bad habits will get _____ the way of your life.
| A．on | B．by | C．at | D．in |
You must concentrate _____ your study not on your clothes.
| A．on | B．with | C．in | D．to |
There are so many beautiful clothes in the store. I really don’t know _____.
| A．what to choose | B．how to choose |
| C．when to choose | D．which to choose |
We all know the _____ of learning English well.
| A．important | B．importance |
| C．different | D．difficult |