It’s good that we _____ to the park because it’s started to rain.
| A．don’t go | B．hadn’t gone |
| C．didn’t go | D．wasn’t going |
We should take good care of our ____. Don't forget to rinse your mouth after meals.
| A．toes | B．eyes | C．hands | D．teeth |
Records, ____, walkman CD and MD are the same instruments that we can use to enjoy music.
| A．tapes | B．hammers | C．diamonds | D．telegram |
The limited supply of water has been put into practice, take care to turn off the running ____ before you leave.
| A．radio | B．traffic lights | C．gas | D．tap |
The bank is equipped with new alarm _____. We can say it's safe and reliable completely.
| A．system | B．way | C．order | D．setting |
A_____ has taught us what atoms are made up of and how powerful the atom bomb is.
| A．seaman | B．salesman | C．naturalist | D．scientist |