He took the machine to pieces to find out how it .
#78504
A
progressed
B
operated
C
equipped
D
managed
推荐题目
It______ a calm head to find the best solution to such a difficult problem within a short time.
#82456
A
costs
B
takes
C
spends
D
needs
——Jim is addicted to novels recently.——Yes, that might _____ why he did so badly in the last test.
#67245
A
answer for
B
apply for
C
account for
D
call for
The problem, according to the experts, is _______ we should do with the salty land.
#68726
A
that
B
how
C
which
D
what