21.As she matured as an artist,she （ ） realize that

21.As she matured as an artist,she （ ） realize that
"all artists are a product of their culture."
A.came to
B.kept to
C.took to
D.went to
满分：2 分
22.NASA's Mars program was set back when two
spacecraft failed up reaching Mars,one （ ）up in the planet's atmosphere and the
other after a software failure.
A.burned;
disappeared
B.burned;
disappearing
C.burning;
disappearing
D.burning;
disappeared
满分：2 分
23.He （ ）the problem （ ）in his mind for a whole week
before he did anything about it.
A.switched...on
B.kicked...up
C.turned...over
D.took...on
满分：2 分
24."Hi,John,could you show me how to （ ） graphics
with text on the same screen?"
A.fuse
B.clone
C.merge
D.mingle
满分：2 分
25.My trip to the small village under the control of
the enemy fire was full of delays and difficulties,but I eventually （ ） .
A.got by
B.turned it over
C.hit the sack
D.made it
满分：2 分
26.The ( ) of older persons is relatively low in
developing countries,but it is growing much faster than in the West.
A.addition
B.majority
C.percentage
D.statistic
满分：2 分
27.When energy is converted from one form to another,
some energy is always lost as heat.（ ）,no energy conversion is 100% efficient.
A.In other terms
B.In other words
C.In another way
D.In some way
满分：2 分
28.In social dancing,the participants dance for their
own pleasure rather than for the ( ) of an audience.
A.appreciation
B.entertainment
C.leisure
D.temptation