As a result of __ is now known in physics and chemistry, scientists have been able to make important discoveries in biology and medicine.
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A
it
B
what
C
which
D
that
推荐题目
At the railway station, the mother waved goodbye to her daughter until the train was _______.
#28184
A
out f sight
B
out f reach
C
out f order
D
out f place
Marty’s disability is “one in a million”. ______, there are not many people in the world like him.
#26116
A
In other words
B
All in all
C
For one thing
D
On the other hand
The roads are lined trees，which have been planted to hold the strong winds from the north.
#26926
A
along; to
B
on；up
C
in；against
D
with；back
We’ll have to race _____ the clock to complete the work on time.
#25645
A
beyond
B
over
C
from
D
against