Is ____ three hours ____ the boy___ family is poor to come to school on foot?
| A．it, that, shoes | B．it, when, that | C．it for, that it takes, whose | D．it, that it takes, whose |
_______ laws of motion are simple, motion, as we see it in the world about us, certainly is not.
| A．When | B． While | C．As | D．Even |
They stood on the top of the high building, ________ they could see the whole city.
| A． in that | B．in which | C．form it | D．from where |
The best job is __________ that uses your skill in doing something together with your interest in the subject.
| A．it | B．the one | C．that | D．one |
After that earthquake last year, we had to start ______ scratch rebuilding our houses.
| A．of | B．from | C．in | D．up |
__________ is responsible for the Chenzhou train collision will be punished.
| A．Whatever | B．No matter what | C． Whoever | D．No matter who |