1 . You     things about. Look, what a mess in your room!

A．always throw	B．have always thrown
C．are always throwing	D．have always been throwing

2 . Selecting a mobile phone is no easy task because technology_______ so rapidly.

A．has changed	B．is changing
C．will have changed	D．will changed

3 . –Have you washed your clothes yet?
-They __________ now.

A．has washed	B．is washed
C．are being washed	D．is washing

4 . They__________on the program for almost one week before I joined them, and now we ________on it as no good results have come out so far.

A．had been working; are still working	B．had worked; were still working
C．have been working; have worked	D．have worked; are still working

5 . Put on your coat! I        you down to the doctor.

A．take

B．am taking

C．took

D．have taken

6 . I don’t really work here; I ______ until the new secretary arrives.

A．just help out	B．have just helped out
C．am just helping out	D．will just help out

7 . If you ______ stealing in the supermarket, you’ll be sent to the police station immediately.

A．catch	B．are catching
C．will be caught	D．are caught

8 . Tell me when you ______ at the airport, Alice. I’ll go there to meet you if I’m free.

A．arrive	B．would arrive
C．have arrived	D．are arriving