He is __________ unusual inventor and he invented _________ useful invention.
A. a; an B. a; a C. an; an D, an; a
—________is the sweater？
—It’s fifty yuan．
| A．How much |
| B．How many |
| C．How old |
| D．How |
We can give old things away to people________．
| A．in the need |
| B．in a need |
| C．in needs |
| D．in need |
I learned how________the new computer．
| A．to use |
| B．using |
| C．use |
| D．to using |
—How long have you________your new bike？
—For two weeks．
| A．bought |
| B．lent |
| C．had |
| D．sold |
—________she________doing her homework yet？
—Yes，she has．She________it just now．
| A．Has；finished；has finished |
| B．Has；finished；finished |
| C．Did；finish；has finished |
| D．Did；finish；finish |