1.The science of medicine----progress has been made lately is perhaps the most important of all the science.
A from which B.about which C.in which D.with which
2The old man,--------had been killed in the earthquake,was given help by the local government.
A.all his children B.all of whose children C.all of his children D.whose all the children
3.In the desert there wasn't a single person --------he could turn for help
A.that B .to whom C.from whom D.with whom
4All----I must do is tidy my bed room every morning.
Awhich B / C what D it