All the neighbors admire this family, ________ the parents are treating their child like a friend.
| A．why | B．where | C．which | D．whose |
At long last the child was found on top of ______ we call the museum of science and technology.
| A．which | B．that | C．what | D．where |
Personally, the job as a teacher _____ be challenging, for I sometimes _____ deal with some smarter but less diligent students.
| A．can; have to | B．may; can | C．has to; may | D．ought to; must |
Nowadays, _______ cars are more and more popular.
| A．electronic | B．electric | C．electrical | D．electricity |
I don’t know why he ________ in the middle of a sentence.
| A．broke off | B．broke out | C．broke down | D．broke up |
College graduates are offered lots of available jobs, ______, I believe, they can fully demonstrate their knowledge and competence.
| A．where | B．which | C．that | D．what |