Mary _____ be in London because I saw her in town just now.
| A．mustn’t | B．isn’t able to | C．needn’t | D．can’t |
—Does he often ask you for help?
—Oh，no，only________.
| A．all the time | B．at one time |
| C．at a time | D．at times |
________， I lost heart in English learning，but my teacher often said to me，“Keep on studying hard，and you’ll succeed________.”
| A．At a time；in time |
| B．At a time；on time |
| C．At one time；in time |
| D．At one time；on time |
Will you be home________to see the children before they go to bed?
| A．on time | B．in time |
| C．at a time | D．at one time |
She lost heart since she failed in the exam.She felt________about her future.
| A．puzzle | B．puzzling |
| C．puzzled | D．puzzles |
It makes his life quite different_______he has received education abroad.
| A．that | B．which |
| C．what | D．how |