--- 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
Kate is good at .
#50209
A
cook and washing
B
cooking and to wash
C
cooking and washing
D
to cook and to wash
We have worked for three hours. Now let's stop _________ a rest.
#50692
A
to have
B
had
C
have
D
having
