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
in the early 20th century, the school keeps on inspiring children’s love of art.
#91131
A
To found
B
Founding
C
Founded
D
Having founded
the room, the nurse found the tape recorder ．
#90853
A
Entering; stealing
B
Entering; gone
C
To have entered; being stolen
D
Having entered; to be stolen
"Can you read?" Mary said to the notice.
#97551
A
angrily, pointing
B
and point angrily
C
angrily, pointed
D
and angrily pointing
Days of snowstorms have left the city under thick layers of ice and some 50,000 homes without power．
#88623
A
to be trapped
B
trapped
C
having trapped
D
being trapped
“Do you have any clothes ___ today, Master?” asked the servant politely.
#97808
A
to wash
B
to be washed
C
washing
D
being washed