I_______ laughing when my son made a face.
#74070
A
burst into
B
burst upon
C
burst out
D
burst on
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He took up my cellphone and made a long distance call as if the phone _____ him. 
#67347
A
belonged to
B
was belonging to
C
was belonged to
D
had been belonged to
As the crowd rushed towards the gate, several people got______.
#70636
A
knocking down
B
knocked off
C
knocking on
D
knocked over