_____ of the water _____ polluted. We must try to protect our environment.
| A．Two third; are | B．Two third; is |
| C．Two thirds; are | D．Two thirds; is |
—Is this dictionary Ming's?
—Yes. Please remember it to him when you finish the words.
| A．to return； to look up | B．to return； looking up |
| C．returning； to look up | D．returning； looking up |
—Whose bag is this?
—I'm not sure. It be Flora's.
| A．might | B．can't | C．must | D．need |
—What's up?
—I missed the train. By the time I got to the train station， the train for 10 minutes.
| A．had left | B．has left |
| C．has been away | D．had been away |
—Do you know what time your uncle Dazhou tomorrow?
—At 2∶00 p.m.. I will meet him when he at the airport.
| A．gets to； arrives | B．will get to； will arrive |
| C．will get to； arrives | D．gets to； will arrive |
—Tommy， don't make a noise! If you have any questions， please your hands.
—Sorry， Mr. Smith. I won't do it again.
| A．put on | B．put up | C．put off | D．put out |