(2013·山东济宁一模)How close parents are to their children ________ a strong influence on the development of the children's characters.
#85574
A
having
B
had
C
has
D
have
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Generally speaking, students’ inner motivation with high expectations from others essential to their development.
#85639
A
is
B
are
C
was
D
were
— Why does the lake smell terrible?— Because large quantities of water ____.
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A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted