The kids are doing some experiment ______ the farm in the country.
| A．in | B．at | C．on | D．for |
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 |
You _______ pay too much attention to your reading skills, as it is so important.
| A．can’t | B．shouldn’t |
| C．mustn’t | D．needn’t |