Beijing is one of the ______ in the world today.
| A．busiest city | B．busiest cities |
| C．busy city | D．busy cities |
Lanmon _________ here for almost ten years and he has many Chinese friends.
| A．has been | B．left | C．has come | D．came |
If everyone pours less polluted water into Dianchi Lake, it will be _______.
| A．deeper and deeper | B．cleaner and cleaner |
| C．dirtier and dirtier | D．wider and wider |
It’s raining outside! Put on your raincoat, ________ you’ll get wet.
| A．and | B．but | C．or | D．though |
We are organizing a lot of activities to celebrate the _______ birthday of the Communist Party of China these months.
| A．nineteen | B．ninety | C．nineteenth | D．ninetieth |
—You should ______ the shower when you are washing your hair.
—OK. I will. We need to save water.
| A．put on | B．put off | C．turn off | D．turn on |