1 . Human impact on the animal kingdom, such as hunting and destruction of habitats, ___________a reduction in the population of certain species in the past three decades.

A．has caused	B．have caused
C．was causing	D．were causing

2 . China is a shining example for the global community to follow _________developing green industry to fight climate change.

A．in addition to	B．in return for
C．in terms of	D．in agreement with

4 . On April 22 every year, people around the world mark Earth Day by _________ the environment.

A．adapting to

B．benefiting from

C．caring for

D．relying on

5 . —Is it all right if I leave a bit earlier?
——_________ . I can finish the report on my own.

A．Sure thing	B．Help yourself
C．Forget it	D．That depends

6 . — Mike will announce his retirement from professional soccer next week.
—________! He’s only 25 and still very fit.

A．I don’t mind at all	B．I couldn’t agree more
C．You will make it	D．You can’t be serious