Put on your coat, ________ you may catch a cold.
| A．and | B．so | C．but | D．or |
We consider ______ some signs to stop people from smoking here.
| A．to set up | B．to put up |
| C．putting up | D．setting up |
Personal computers ______ in 1976. It has changed the whole world.
| A．have invented | B．were invented |
| C．is invented | D．invented |
—Terra, you shouldn’t be so ______. You always leave your things everywhere.
—Sorry, mom. I’ll put them away soon.
| A．terrified | B．cheerful |
| C．frightened | D．careless |
By the time I got home, Gina and her sister ______ their project already.
| A．finished | B．have finished |
| C．had finished | D．will finish |
—I think you can ______ money by yourself to buy a present for your mother.
—OK. I’ll try. I’ll not let a penny waste.
| A．spend | B．save | C．cost | D．leave |