______is difficult to______ others.
| A．That , depend on | B．It , depend on |
| C．This, depend on | D． It, depend with |
We were angry ________ him for keeping us waiting.
| A．with | B．at | C．for | D．on |
Tony is ________ to go to school.
| A．enough old | B．old enough |
| C．enough young | D．young enough |
Sam worked until midnight yesterday. So he feels ______ today.
| A．sleep | B．asleep |
| C．sleepy | D．sleeping |
He failed the exam ________ he was too careless.
| A．because | B．but |
| C．so that | D．so |
You can’t do _______ before you finish your homework.
| A．something | B．anything |
| C．nothing | D．nobody |