---I don’t think _______ Maths is easy.
| A．that | B．if | C．whether | D．why |
---Thanks for _________ the new chairperson.
| A．recommend me as | B．recommending me as |
| C．recommend me to | D．recommending me for |
--- 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 |