An unhappy childhood may have some negative effects on a person’s charater;however,they are not always___
| A．practical |
| B．avoidable |
| C．permanent |
| D．beneficial |
Sitting under the willow trees ____ an old man.
| A．is | B．are | C．is there | D．are there |
It was with the selfless help of our teacher ______ we realized our dream.
| A．that | B．who | C．when | D．how |
To build a harmonious society, we all have a part to play in the fight ____ injustice, unemployment and crime.
| A．over | B．by | C．for | D．against |
This chemical material is very toxic. So put it ______ the children’s reach.
| A．by | B．beyond | C．within | D．from |
The central heating system of this office building is down and several workers ______ it right now.
| A．had repaired | B．have repaired | C．repaired | D． are repairing |