Although you have lots of difficulties, you must ______your work.
| A．carry out with | B．carry away on | C．carry on with | D．carry over |
He _____get up late, but now he gets up earlier.
| A．used to | B．was used to | C．is used to | D．uses to |
Nothing can ______ the girl from _____ there.
| A．keeps, going | B．prevent, going | C．stop, to go | D．prevent, to go |
---Are you going to go shopping this afternoon? ---No，I'm _____ tired _____go．
| A．so, that | B．enough, to | C．too, to | D．／，to |
Stamps are usually used _____letters.
| A．to sending | B．to send | C．for send | D．for sent |