______ example of John shows that ______ knowledge of first aid can help a lot.
#9668
A
The; a
B
An; 不填
C
An; a
D
The; 不填
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If you are in position of __ teacher, will you allow your students to play computer games all day long?
#9047
A
/; a
B
a; /
C
the; /
D
the; a
We can never expect________bluer sky unless we create________less polluted world.
#8706
A
a; a
B
a; the
C
the; a
D
the; the
Canada is one of largest countries in the world, second only to Russia.
#8443
A
the; the
B
the; a
C
a; the
D
the;/
The knife and fork ____ different uses at meals, and every westerner has ____ knife and fork.
#9859
A
have; the
B
have; a
C
has; the
D
has; a