Either the Greek or the Australian ________ the boxing competition.

Only when you ______ what you have learned to practice ______ say you have made it.

Rick isn’t here，______you can leave a message on his desk.

Taiyuan, a city in North China, was struck by a heavy snowfall last week, ______ serious traffic problems

The woman she acted in the film is ______ the women in the 1930s. [ ]