Mary ________ as a secretary in this company for twenty years and now she stays at home taking care of her own garden.
A.has served | B.had served |
C.is serving | D.served |
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 |
China's present environment situation is from bad to worse and if we _________ now to protect the environment, we’ll live to regret it.
A.hadn’t acted | B.haven’t acted | C.don’t act | D.won’t act |