-Some measures have been taken to prevent the environment from being destroyed.
-Yes. And the wildlife in this area _______.
| A．are under protection |
| B．is under the protection |
| C．is being protected |
| D．are being protected |
Oh, it's you, I'm sorry I ____know you ____here.
| A．don't, are | B．didn't, are | C．didn't ,were | D．don't, were |
Wherever I ____these days. I always carry my umbrella.
| A．am going | B．shall go | C．go | D．should go |
It is five years since my dear aunt _______ here.
| A．left | B．has left | C．is left | D．had left |
It ________ nearly two weeks ______ I had received his letter.
| A．is, that | B．was, that | C．is since | D．was, since |
----This returned Chinese scholar has become one of the top experts in this field.
----Yes,I know him very well.He____in Africa with animals for eight years.
| A．has worke | B．had worked | C．worked | D．has been working |