----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

It ________ nearly two weeks ______ I had received his letter.

A．is, that

B．was, that

C．is since

D．was, since

It is five years since my dear aunt _______ here.

A．left

B．has left

C．is left

D．had left

Wherever I ____these days. I always carry my umbrella.

A．am going

B．shall go

C．go

D．should go

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

I___ to have another try if I get another chance.

A．have been meaning

B．mean

C．am meanin

D．have meant

-----What _____?
-----I______my key and can't open the door.

A．happened, lost	B．has happened, lost
C．happens, have lost	D．has happened, have lost

The students _____ ￡50 a year to cover the cost of books and stationery.

A．give	B．are given
C．have given	D．to give

-Jack is ill in hospital.  --Really, I _____ him right now.

A．will visit

B．am going to visit

C．am to visit

D．am about to visit

-Have you seen the film? 
--Yes. I _______ it three times when I was in Tokyo.

A．saw

B．had seen

C．have seen

D．was seeing