Many difficulties have         as a result of the change over to a new type of fuel.
#71357
A
risen
B
raised
C
arisen
D
arrived
推荐题目
While listening carefully,  the students___ what their teacher said. 
#69711
A
set down
B
turned down
C
got down
D
calmed down
—Thank you very much. —It’s a piece of cake compared to your saving my life: I am forever ______.
#66092
A
in your debt
B
in debt
C
getting into debt
D
remembering you
It’s better to express your anger ______ bottle it up.
#65135
A
more than
B
other than
C
rather than
D
or rather