—I have never been to the Great wall.
—If you have an opportunity _______ there, you must take it.
| A．to go | B．to going | C．going | D．go |
--- He couldn’t hide his __________ at my success and said bad words about it.
| A．envy | B．wisdom | C．purity | D．power |
--- Are you going to __________ this challenge?（挑战）
| A．take up | B．take down | C．take off | D．take on |
---The boy looks nice ________ white and the red sweater looks good ________ the girl.
| A．with； on | B．in； on |
| C．on； in | D．in； with |
--- We just need one of you for the game. ________you _______your brother can join us.
| A．Both； and | B．Neither； nor |
| C．Either； or | D．Not only； but also |
--- Cross the road carefully, __________ you’ll keep yourself safe.
--- Thank you.
| A．so | B．or | C．but | D．and |