We can’t work out the physics problem. Can you tell us _________?
A. how to do B. what to do it
C. how to do it D. what should to do
I’m now in New York with my friend Jenny. We _________ by plane on Monday.
A. arrive B. arrived
C. are arriving D. will arrive
Since2000, it has become a new town. Everything _________.
A. changed B. was changed
C. had changed D. has changed
–Dave, we will leave in10 minutes. Are you ready?
– No, I ________ our guide book and towels yet.
A. don’t pack B. didn’t pack
C. have packed D. haven’t packed
–What does she usually use the computer _________?
– She usually uses it to chat with her friends.
A. to B. on C. for D. about
The factory _________ since two years ago.
A. has been open B. has opened
C. was open D. opened
