During the scientific experiment, Mr. Chen carefully poured the water into the tube, with my classmates _______ beside to see what would happen. 
#91602
A
were standing
B
stood
C
standing
D
to stand
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With lots of trees and flowers _____here and there, the city looks very beautiful.
#91553
A
having planted
B
planted
C
have been planted
D
to be planted
_________, the car could not be started.
#91449
A
Having lost the key
B
He lost the key
C
The key was missed
D
The key lost
With so many things _______, we haven’t decided on the final plan yet.
#90972
A
considered
B
having considered
C
to consider
D
considering