Mrs.Smith finds it hard to clear up the mess,as her children are always ________ whenever she tries to.                                                     (2013·福建,29)
#64247
A
in the way
B
on watch
C
in sight
D
on the line
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After a second thought, Bill ________ a better idea of how to solve the problem.
#65658
A
put up with
B
kept up with
C
came up with
D
mixed up with
His sister left home in 1998, and _______since. 
#84460
A
had not been heard of
B
has not been heard of
C
had not heard of
D
has not heard of