---Excuse me, sir. Is the swimming pool open all day?
--- . Only from 6:00 pm to 10:00 pm.
| A．That’s night |
| B．Yes, of course |
| C．Sorry, I am not sure |
| D．Sorry, I’m afraid not. |
They have been skating______ 2 hours ago.
| A．for | B．until |
| C．since | D．after |
----Why don’t you go to the movie with me?-----Because I _______it already.
| A．saw | B．have seen |
| C．see | D．seen |
____ useful the computer is!
| A．What a | B．What an |
| C．How | D．How a |
Do you remember what ____ at 11:00a.m yesterday?
| A．were you doing | B．you were doing |
| C．are you doing | D．you are doing |
When Tom got to my house, my family ___ dinner.
| A．were having | B．was having |
| C．is having | D．are having |