15. The mayor of Beijing says that all construction work for the Beijing
Olympics ____________ by 2006.
A. has been completed B.
has completed
C. will have been
completed D. will have
completed
二 完形填空30%
Scientists
used to explore on the surface of the ocean. Now they are exploring 16 the surface, too. They want to know about
ocean water and the plant and animal life
17 in the ocean.
In 1934 the scientist William Beebe
18 3,000 feet below the surface in a hollow
steel ball. In 1935 August Piccard dived 10,330 feet. In 1960 his son Jean
dived to a 19 of 35,800 feet.
All these early divers
were deep. But the divers could not stay down 20 . They 21 back up to the surface 22 a few seconds. Scientists needed to
stay down longer to study 23 below surface. Gradually they succeeded.
Cousteau, a Frenchman
24 keep man down to a depth of 36 feet for
one month and to s depth of 90 feet for a week.
Now scientists
are 25 even better equipment. 26 this new equipment, men can stay below
the surface for days 27 even weeks. In 1962 Cousteau 28 a research station 35 feet below the
surface. Then in 1964 he set up 29 station on the ocean floor of the Red
Sea. This was the first undersea station 30 without help from the surface.
Many countries are now
studying undersea living. The former Soviet Union has an undersea laboratory in
the Crimean Sea. The United States has a laboratory 50 feet down on the ocean
floor 31 the Virgin Islands. In 1970 five men
lived there for two weeks. Then a team of five women scientists stayed in the
laboratory. Next 32 other teams of men. All were there
to 33 the ocean depths and to make plans
for the use of its resources. Scientists 34 enough mineral, vegetable,
and animal wealth there to 35 food for the entire world.
