To be healthy, one must have at least _____ sleep every day.
| A．eight hours | B．eight hour’s |
| C．eight-hour’s | D．eight hours’ |
She not only sings , she plays the piano .
| A．also | B．too | C．either | D．as well |
The girl is shy . She always feels to speak in front of the class .
| A．interested | B．excited |
| C．nervous | D．surprised |
he explained , we understood .
| A．More , better | B．The most , the best |
| C．Most , best | D．The more , the better |
Child should learn to do things themselves .
| A．with | B．on | C．by | D．in |
She a very close friend of mine .
| A．was used to be | B．used to be |
| C．use to being | D．was used to being |