The boy is _______ to look after himself .
| A．enough old | B．enough young | C．old enough | D．young enough |
—Will people live to be 300 years old?— ______________.
| A．No, they aren’t | B．No, they won’t |
| C．No, they don’t | D．No, they can’t |
There are about seven ____ students in Grade Eight in Chezhan Middle School.
| A．hundreds | B．hundreds of |
| C．hundred | D．hundred of |
His mother ____ in a village five years ago.
| A．lives | B．lived | C．is living | D．will live |
I will work in Beijing ____ ten years.
| A．at | B．for | C．after | D．in |