Maria has _____ trouble _____ math, so she often asks her math teacher for help.
#49150
A
much; understanding
B
no; with
C
many; understanding
D
not; to understand
推荐题目
Don’t jump to a conclusion! Let’s _______ the problem first.
#49685
A
discussion
B
discussing
C
discuss
D
to discuss
It’s necessary        us        English well.
#49684
A
for , to learn
B
for , learning
C
of , learning
D
of , to learn
Thanks a lot for ______ me to join you. 
#50002
A
invite
B
invited
C
inviting
D
invites
They decided           at the end of this month.
#49560
A
to leave
B
going back
C
travel
D
not start out.