—Professor Smith, I’d like to take a gap year to Africa to serve in a global anti-Aids campaign.
—Good idea, ______ you can afford the time.
| A．provided that | B．in case |
| C．even if | D．so that |
English is not easy _____.
| A．learning | B．to learn | C．to be learned | D．learned |
It is ______ to rain this afternoon.
| A．likely | B．possible | C．probable | D．possibly |
I wish you _____ go to the art gallery with us. If there _____ enough
tickets, I’d let you know.
| A．can, were | B．could, were | C．will, were | D．will, is |
Some of you may have finished unit one．________, you can go on to unit two．
A．If you may B．If you do C If not D．If so
Not until he left his home __________ to know how important the family was for him．
| A．did he begin | B．had he begun | C．he began | D．he had begun |