He has failed a few times, but he won’t . .
| A．get on | B．come on |
| C．give up | D．get up |
---Someone is knocking at the door. Who may it be?
---It ______ be Tom. He is still in the school.
| A．can’t | B．mustn’t | C．couldn’t | D．may not |
---Have you seen Dr. Adams recently?
---No. He __________ Hong Kong for an important meeting. He’ll come back tomorrow.
| A．has gone in | B．has been in | C．has gone to | D．has been to |
--- Would you come back to have dinner with us this evening?
--- I’d love to, ______ I have an important meeting .
| A．and | B．or | C．so | D．but |
There __________great changes in our hometown in the past fifteen years.
| A．has been | B．have been | C．was | D．were |
-----________did your uncle leave his home town ?
----He ___________for nearly twenty years.
| A．When , has left | B． When , has been away |
| C．How long , has left | D．How long , has been away |