The radiation of uranium was then regarded as_____secret of_____nature.
#10089
A
a;the
B
a;a
C
the;the
D
a;/
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His explanation that he was at loss what to do next doesn't hold water.
#8351
A
a ;/
B
a; the
C
the; /
D
/;/
—Why does this country need so many exports from abroad?—Because it has ________large population,________its poor natural resources.
#10149
A
the;adding
B
a;including
C
the;beside
D
a;plus
John, _______ university professor, is considered to be _______ success as ______ expert in the agriculture research.
#9081
A
a; a; an
B
an; / ; an
C
the; /; an
D
a; the; an