I think that you have made in math.
| A．rapid progresses | B．a rapid progress |
| C．rapid progress | D．the rapid progress |
-Is this kind of digital camera made of steel?
-Yes, and it's widely used ______ taking photos.
| A．as | B． for | C． from | D．of |
-_____ is the population of America?
-I don’t know. But I know it’s ______ than that of China.
| A．What; smaller | B．What; less |
| C．How much; smaller | D．How many; less |
- I like reading story books. - _______.
| A．So does Lily | B．Lily does so |
| C．So did Lily | D．Lily did so |
She has worked in this factory ______ she came here in 2010.
| A． when | B． since | C．for | D．from |
- How long has David’s grandfather ______? -About two months.
| A．bought the car | B．left China |
| C．been dead | D．joined the club |