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【单选题】
The inferior vena cava is a large __________.A.
artery
B.
vein
C.
capillary
D.
aorta
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【单选题】As children we were best friends, but as we grew up we just drifted _____.
A.
apart
B.
away
C.
off
D.
out
【单选题】As we age , the language center in our brain becomes less flexible than it was when we were small children, and learning an additional language with fluency will always take vastly longer than it ...
A.
Grow old.
B.
Length of time that a person has lived or a thing has existed.
C.
Old age.
D.
Latter part of life.
【单选题】The warning we were given as children ________ an apple a day keeps the doctor away may，in fact，have a scientific explanation.
A.
that
B.
who
C.
where
D.
which
【单选题】As we grow older, birthdays seem to more quickly than when we were children.
A.
come in
B.
come around
C.
come out
D.
come over
【单选题】The warning we were given as children ________ eating fast will make you fat, may in fact, have a scientific explanation.
A.
that
B.
who
C.
where
D.
which
【简答题】As children we were very close, but as we grew up we just __________.
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