—It cost me 30 yuan to get here.
—Well, it was crazy of you to take a taxi _________ you would come
by bus as well.
| A．unless | B．when |
| C．if | D．Because |
We ______ John’s name on the race list yesterday but for his injury.
| A．will put | B．will have put | C．would put | D．would have put |
Some insects ______ the color of their surroundings to protect themselves.
| A．take in | B．take off | C．take on | D．take out |
The living room is clean and tidy, with a dining table already ______ for a meal to be cooked.
| A．laid | B．laying | C．to lay | D．being laid |
Sam _____ some knowledge of the computer just by watching others working on it.
| A．brought up | B．looked up | C．picked up | D．set up |
That’s the new machine ______ parts are too small to be seen.
| A．that | B．which | C．whose | D．What |