The development of industry has been_______ gradual process throughout _______ human existence, from stone tools to modern technology.
#9174
A
不填, the
B
the; a
C
a; 不填
D
a; a
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—Have you heard of _______ death of Nelson Mandela? —Yes. It is indeed _______ loss to the world.
#8008
A
the; a
B
a; the
C
the; /
D
a; /
_____ new cure for this disease that medical experts have recently developed proves to be ______ most effective, although it can not completely kill all the viruses.
#8140
A
A; a
B
The; /
C
/; the
D
A; the
All of ______ sudden, a terrible animal appeared and all the people held still in _____ terror..
#9396
A
a; the
B
/;/
C
the; the
D
a; /
An accident happened at________crossroads a few meters away from________bank.
#7736
A
/；a
B
a；a
C
/；the
D
the；/