.---I’m sorry, but there’s no smoking room in this section on the train.
---Oh, I _____ that, and I won’t smoke again.
| A．don’t know | B．won’t know | C．didn’t know | D．haven’t known |
I like getting up very early in summer. The morning air is so good _________.
| A．to be breathed | B．to breathe |
| C．breathing | D．being breathed |
Allen had to call a taxi because the box was _______ to carry all the way home.
| A．much too heavy | B．too much heavy |
| C．heavy too much | D．too heavy much |
A cook will be immediately fired if he is found _______ in the kitchen.
| A．smoke | B．smoking | C．to smoke | D．smoked |
One-third of the country____ covered with trees and the majority of the citizens______ black people.
| A．is ; are | B．is ; is | C．are ; are | D．are ; is |
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 |