Every boy and every girl ______ that each day and each hour brings ______ duty.
#86212
A
know；their
B
knows；their
C
knows；its
D
know；its
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The number of people invited ______ fifty, but a number of them ______absent for different reasons
#85927
A
were;was
B
was;was
C
was;were
D
were;were
Three-fourths of the buildings ______.
#85968
A
was destroyed
B
is destroyed
C
were destroyed
D
has been destroyed
We live day by day，but in the great things the time of days and weeks ____ so small that a day is unimportant.
#86203
A
is
B
are
C
has been
D
havebeen