21.   When Chester and other casino workers arrived at work that day, they found armed FBI agents guarding locked doors.

22.   While most collectors probe online sites, flea markets and antique shows for rare Coke items, Mooney guards the door to the best selection that exists.

23.   Yellow-shirted loss prevention specialists guard the doors, while monitoring a bank of cameras.

24.   Police guarded the door and the windows were covered with newspaper to prevent anyone from looking inside.

25.   Police guarded the door and the windows were covered with newspaper to prevent anyone looking inside.

26.   A helicopter circled overhead and hundreds of police in bulletproof vests guarded every door.

27.   A policeman guarded the door.

28.   Except for doctors, only his wife and parents have been allowed to his bedside, and a phalanx of police have guarded his door.

29.   Except for doctors, only his wife and parents have been allowed at his bedside, and a phalanx of police have guarded his door.

30.   No bouncer guards the door.

v. + door >>共 423
open 39.17%
close 13.24%
lock 6.40%
shut 5.89%
slam 4.17%
answer 2.71%
unlock 1.54%
knock_on 1.40%
out 1.20%
have 1.03%
guard 0.46%
guard + n. >>共 664
entrance 4.35%
building 3.39%
border 3.31%
site 3.19%
privacy 2.73%
area 2.61%
house 1.45%
door 1.41%
prisoner 1.41%
gate 1.24%
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