－Can you tell me how many colours _______ in a rainbow?
－Seven.
| A．there are | B．are there | C．they are | D．are they |
---Your help made __________ for me to work out this problem.
| A．it easily | B．it easy |
| C．that easily | D．that easy |
---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 |