From his _______ expression on his face, we know he is _______.
#18658
A
frightening, frightened
B
frightening, frightening
C
frightened, frightened
D
frightened, frightening
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31. – How did your father catch so many fish?– By using a ________. 
#20284
A
bamboo long fishing pole
B
long bamboo fishing pole
C
fishing long bamboo pole
D
bamboo fishing pole, long
Judging from his _______ look, I know it is a very _____ situation to her.
#18883
A
confused; confused
B
confusing; confusing
C
confusing; confused
D
confused; confusing
Our       new machines are much cheaper to run.
#17719
A
effective
B
efficient
C
energetic
D
enthusiastic