Mother, together with her children , ______ to the hospital.
The professor devoted all his life ____the treatment of AIDS. A to research B.in researching C.to researching D.at researching
----Where did you put the broom,Tom? -----I _______it behind the door.But now it is gone.
They experimented _____the new medicine _____animals. A.on; to B by ; on C.with ; on D with; to
Children under six are not ______to school except those of extraordinary intelligence. A.permitted B.admitted C accepted D.received
three times,but she still couldn’t follow what the old man said.