Mom, my friends, Dave and Jack.
| A．this is | B．they is | C．he and she | D．these are |
_____ the students in our school is about 5000,_______ of them are boys.
| A．A number of ; three fifths |
| B．The number of ; third fives |
| C．A number of ; third fifths |
| D．The number of ; three fifths |
________ plastic bags we use, ________ it will be to the environment.
| A．The less; the better | B．The less; the worse |
| C．The fewer; the better | D．The fewer; the best |
Noise pollution can cause people to become sick. So our government has done________to stop it.
| A．anything useful | B．useful anything |
| C．something useful | D．useful something |
He _______ his head to see the _______ sun.
| A．rises; raise | B．rises; rising |
| C．raises ; rising | D．rises ; raising |
-These farmers have been to the United States.
-Really? When _______ there?
| A．will they go | B．did they go |
| C．have they been | D．have they gone |