IP addresses are the unique sequence of numbers ______ to each computer, websites or other Internet-connected devices. 
#90700
A
to assign
B
assigning
C
assigned
D
being assigned
推荐题目
I went back to the cinema to look for my keys, only __________. 
#97192
A
finding it shut
B
having found it gone
C
to find it closed
D
to have found them
When the man came in, gun in hand, we all stood there, ________.
#95704
A
frightened
B
frightening
C
being frightened
D
having frightened
Anyone _____ bags, boxes, or whatever, was stopped by the police. 
#98766
A
seen carry
B
seen carrying
C
saw to carry
D
saw carrying