Engineering is ______ challenging course of study that requires ______ thoroughunderstanding of mathematics and science.
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A
the; a
B
a; the
C
不填；不填
D
a; a
推荐题目
Jumping out of ______ airplane at ten thousand feet is quite ______ exciting experience.
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A
/; an
B
/; the
C
an; an
D
the; the
That Xiao Shenyang was elected _____model worker of May Day caused ____enthusiastic discussion in China．
#9890
A
the, the
B
a, an
C
the, a
D
a, the
In ______ new comedy series Hot Mom, which just finished airing two weeks ago, Sun Li became, as the title indicates, ______ hot mother.
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A
/; a
B
the; a
C
the; the
D
a; a
Failure to face up to painful experience can be ______ form of stress itself, and can increase ______ possibility of illness.
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A
the; /
B
a; a
C
a; the
D
/; the
Everybody has _____ responsibility to save water, if future generations are to enjoy ____ similar standard of living to the one we enjoy now.
#8131
A
the; /
B
a; a
C
/; the
D
a; the