--- You look ______,Paul. What’s the matter?--- I’m having trouble ______ math.
#51056
A
tired, to learn
B
worried, learning
C
frustrated, to learn
D
angrily, learning
推荐题目
Don’t forget ________ the lights before you go to bed.
#49236
A
turn off
B
turning off
C
to turn off
D
turns off
On the way to the post office, I heard some children ________the English song.
#48666
A
sang
B
to sing
C
singing
D
sings
---I often chat with my friends on the Internet.---You are so smart! Will you please tell me ________?
#49449
A
how to do
B
how to do it
C
how to use
D
when can I use it