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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______ everything ______, she left the supermarket with satisfaction.
#91176
A
As; buying
B
For; to buy
C
With; bought
D
Because; to buy
_______ no buses , we have to walk home.
#91534
A
There were
B
There being
C
It was
D
It being