- your teachers strict you ? -Yes.
-Is this kind of digital camera made of steel? -Yes, and it's widely used ______ taking photos.
-_____ is the population of America? -I don’t know. But I know it’s ______ than that of China.
- I like reading story books. - _______.
She has worked in this factory ______ she came here in 2010.
- How long has David’s grandfather ______? -About two months.