---I find the more we study, the more difficulty we have ________ out Maths problems.---Oh, I agree with you. Maths is more and more difficult.
#50150
A
worked
B
work
C
works
D
working
推荐题目
Teenagers should do what they can ________ their achievements.
#48794
A
to realize
B
realize
C
realized
D
will realize
—What do you think has made Jane so worried?—_______ all the tickets for the stamp show.
#50580
A
Lose
B
Lost
C
Losing
D
To lose