--- 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
It is a good time _______.
#49260
A
sing.
B
to sing.
C
singing.
D
sang.
The children are _____ when they hear the _____news.
#50200
A
exciting, exciting
B
exciting, excited
C
excited, exciting
D
excited, excited
 When I walked past his house, I heard him _______.
#50226
A
to sing
B
sang
C
sings
D
singing