In the experiment we kept _____ watchful eye on ______ developments and recorded every detail.
#8558
A
a; /
B
/; the
C
a; the
D
/;/
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My father is clearly in____ dilemma about how to handle___ quarrel between us.
#9652
A
the; a
B
/; the
C
a; the
D
a; /
We all long for _______ world where people live in _______ peace without killing and war.
#7975
A
the; /
B
a; the
C
a; /
D
the; the
The development of industry has been ________ gradual process throughout ______ human existence from stone tools to modern technology.
#9114
A
不填；the
B
the; a
C
a; 不填
D
a; a
As matter of fact, number of young couples who plan to have a second kid is increasing rapidly.
#8105
A
the; a
B
a; the
C
a; a
D
不填；the
Many people agree that______ knowledge of English is a must in______ international trade today.
#8128
A
a; 不填
B
the; an
C
the; the
D
不填；the