Some people hold the view that the new machine is advanced, while others are still skeptical _____ whether it is of practical use.
#14015
A
with
B
about
C
for
D
on
推荐题目
The world’s population has grown by ______ it was in 1800.  
#14205
A
more than six times that
B
six times more than that
C
more than six times what
D
six times as many as
Almost       of the students in the class       glasses.
#14103
A
two thirds; wear
B
two thirds; wears
C
two third; wear
D
two third; wears
 Eating too much fat can ______ heart troubles and high blood pressure.
#13883
A
attach to
B
attend to
C
contribute to
D
devote to