---We can’t expect _____blue sky unless we create ____less polluted world.
| A．a; a | B．a; the | C．the; a | D．the; the |
Li was beaten in the contest, ______ had been expected.
| A．what | B．that | C．as | D．who |
Choosing what ______is no longer as easy as it once was, for people’s eating habits are changing,
| A．eat | B．to be eaten | C．eaten | D．to eat |
— Do you have difficulty getting along with the new colleagues?
— No. I______ quickly.
| A．kept on | B．fit in |
| C．calmed down | D．cheered up |
The house ______as a reading room is under construction.
| A．used | B．being used |
| C．having been used | D．to be used |
He explained the question again to make it easier _______.
| A．to understand | B．understanding |
| C．understood | D．understand |