Teaching pronunciation class to a mixed group of learners can ________ a teacher with many challenging problems.
#11050
A
provide
B
produce
C
present
D
offer
推荐题目
He ____ some French while he was away on a business trip to Paris.
#13874
A
made out
B
picked up
C
gave up
D
took in
The new bridge is ________ the one built last year. 
#14048
A
three times as wider as
B
three times the width of
C
three times the width
D
as three times as