As is well known，Edison was one of the greatest scientists________.
A.all the time B.all time C.of all time D.of all the time
Anna was reading a piece of science fiction，completely ________to the outside world.
A.having been lost B.to be lost C.losing D.lost
________enough preparations，they thought it better to put off the trip till next week.
A.Not making B.Having not made C.Not having made D.No made
The new plan________ three parts，each of which is very important.
A.composes of B.is composed of C.makes up D.makes up of
So far，the death toll has climbed to over 2,000 from a destructive earthquake in China's Qinghai Province，with nearly 200 people still________.
A.missed B.lost C.disappeared D.missing
. When my grandpa was young, he had to________several miles a day to school since he had no money to take a bus.
A.cover B.take C.get D.make
