---How many arms _____ there? ----There _____ an arm.
A. are, are B. is, is C. are, is
My brother has a ______ daughter. She’s kind and lovely.
| A．four-years-old | B．four-year-old |
| C．fourth-year-old | D．four-year-olds |
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 |