We can never expect____bluer sky unless we create____ less polluted world.
#9999
A
a; a
B
a; the
C
the; a
D
the; the
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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
According to the newsman, as a result of_____ heavy fog, _____ expressway has been closed up until further notice.
#9582
A
a; the
B
the; 不填
C
不填;an
D
the; the
Keeping a diary is ____ good habit. Stick to it, and you will make ____good progress in writing.
#9926
A
a; /
B
a: a
C
the; a
D
/; a
He is one of the world-famous musicians. By the time he was six, he ______ composing.
#8024
A
had begun
B
begins
C
would begin
D
was beginning