The rubbish _____ is produced every day is becoming a serious problem in cities around the world.
| A．that | B．who | C．where | D．whom |
There are many tall buildings on ____sides of the street.
| A．each | B．every | C．both | D．either |
Our English teacher is ill, so Mr. Smith will take her class _____.
| A．instead | B．instead of |
| C．except | D．at the end |
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 |