For years, doctors ________ millions of patients lives with the help of microscopes．

A．saved

B．have saved

C．has saved

D．were saving

He ________ his lunch．

A．had

B．have had

C．has had

D．ate

________ you ever ________ to Shanghai．

A．Haven’t arrived

B．Hasn’t arrived

C．Didn’t arrived

D．Have…been

The new books ________ yet．

A．haven’t arrived

B．hasn’t arrived

C．didn’t arrive

D．don’t arrive

When I was at school, I ________ to the library every day．

A．go

B．was going

C．have gone

D．went

I ________ a letter from him since he left．

A．didn't receive

B．haven't got

C．haven't heard

Tom ________ the CD player for two weeks．

A．has borrowed

B．has bought

C．has had

－________ you ________ anywhere before?

－Yes, but I can't remember where I ________

A．Did; surf; surfed

B．Have; surfed; surfed

C．Have; surfed; have surfed

－Mum, may I go out and play basketball?

－________ you ________ your homework yet?

A．Do; finish

B．Did; finish

C．Have; finished

－Ann has gone to Shanghai．

－So ________ her parents．

A．has

B．had

C．have