Every man has his faults. We should, therefore, learn to be ______ of others.
That’s the factory _______we paid a visit last year.
The field research will take Joan and Paul about five months; it will be a long time _____ we meet them again.
All the travelers _____that they should bring their ID cards with them.
There is a big dog _______to a fence outside the house.
The fog was so heavy this morning that drivers could hardly ________ the things just ten meters away from them.