Every device ______in the plane must be designed and made with great care so as to make sure that nothing goes wrong in operation. 
#98567
A
fitted
B
to be fitted
C
fitting
D
being fitted
推荐题目
So difficult ____that no one could ___ a good solution to it.
#90783
A
was the problem; come up with
B
the problem was; come up with
C
the problem was; put up with
D
was the problem; put up with
He did the right thing ___ for some fresh air even in cold winter.
#97777
A
to keep the chidlren from going out
B
to prevent the childern from going out
C
to keep the children going out
D
to prevent the children going out