----I’m sorry, but there is no smoking on this flight.
----Oh, I _____ that. Sorry, I won’t again.
| A．don’t know | B．didn’t know | C．won’t know | D．haven’t known |
-- We’re organizing a party next Saturday, and I’d like you to come.
-- _______! I have another one that day. Thank you just the same.
| A．Good luck! | B．What a pity! | C．Never do it again! | D．Well done! |
. Can you think of a _____ in which you could use this expression.
| A．situation | B．condition | C．state | D．matter |
– What do you think of the book ?
-- Oh, excellent. It’s worthy ______ a second time.
| A．to read | B．to be read | C．being read | D．to being read |
. It was some time _____ we realized the truth.
| A．when | B．until | C．since | D．before |
Having a trip abroad is certainly good for the old couple, but it remains _____ whether they will enjoy it.
| A．to see | B．to be seen | C．seeing | D．seen |