----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 |
．Did you have trouble_________the entrance to the hill ?
| A．in finding | B．to find | C．with finding | D．find |
--- What is your hobby , Jack ?
--- Collecting stamps . What about you ?
---_________.
| A．I’d like to say | B．I won’t say anything |
| C．I enjoy fishing | D．I am too |
．_________breaks the law should be punished .
| A．Who | B．Whoever | C．No matter who | D．Anyone |
Mabel insisted that she_________someone in the next room just now .
| A．see | B．saw | C．should see | D．would see |
Tom is very confident_________ Mary is shy and quiet .
| A．so | B．as | C．while | D．if |