—What color is _______ orange?
—It's____ orange.
| A．an, an | B．the, the | C．an / | D．a, / |
The famous writer________eight popular books since 2005．
| A．writes |
| B．wrote |
| C．has written |
| D．is writing |
We________more than 1，600 words since we began to learn English．
| A．learn |
| B．have learned |
| C．learned |
| D．are learning |
—________have you been in the sports club？
—For two years．
| A．How often |
| B．How soon |
| C．How long |
| D．How much |
She________her hometown since she was 18 years old．She told me she would return soon．
| A．has left |
| B．has been away from |
| C．left |
| D．went away |
—When did you buy the book？
—Two years ago．That is to say，I________it for two years．
| A．bought |
| B．will buy |
| C．have bought |
| D．have had |