Mrs Mavis said the aliens took her away so that they could do research _______ her.
| A．on | B．for | C．about | D．with |
Almost all of his time ______ experiments, he has no time to visit his parents.
| A．devoted to do | B．devoted to doing |
| C．devoting to doing | D．is devoted to doing |
---Look, our headmaster is over there, playing basketball with some students of our class.
--- Oh, he must be ________ to his students.
| A．possible | B．valuable | C．available | D．accessiblee |
—Have you seen my dictionary?
---- Is it _______ you bought last week? Perhaps _______ is on your bed.
| A．one; that | B．the one; it | C．the; there | D．one; here |
Your niece is very strict and ______ worth teaching, but your nephew is not. Look, he is now ______ asleep in class.
| A．well; fast | B．much; very | C．very; fast | D．well; very |
Our school has used computers in teaching for ten years. As a result, not only______, but students become more interested in their lessons.
| A．has teachers’ energy been saved | B．saved was teachers’ energy |
| C．teachers’ energy has saved | D．was saved teachers’ energy |