A study ________ in the USA in 1977 showed that the chemical ASA in aspirin could prevent a stroke.
#95255
A
carrying out
B
carried out
C
working out
D
worked out
推荐题目
To their surprise, they found the lecture given by the famous professor easy ______.
#96616
A
to be understood
B
to understand
C
understanding
D
understood
Every evening after dinner, if not ______from work, I will spend some time _____ my dog.
#90033
A
tired; walking
B
tiring; to walk
C
being tired; walked
D
to be tired; walk
Could I have a cigarette? I seem_________.
#95362
A
to run out
B
to have run out
C
to have run out of
D
to have been run out
The air has leaked out of this football.Could you get it ________ up?
#88277
A
blow
B
blowing
C
blown
D
to blow