We can see__ old bike __the tree.
| A．a; under | B．the; at | C．a; on | D．an; under |
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 |
—__________ does it take you to drive to Changgong to work every day?
—About one hour and a half.
| A．How | B．How soon | C．How often | D．How long |