单项选择题
If you don’t ______ smoking, you’ll never get better.
单项选择题 Edison tested more than one thousand materials to see if they could _____ electric current and glow.
单项选择题 Those nations that interfere in the internal affairs of another nation should be _____ condemned.
单项选择题 My boss insists on seeing everything in ______ before he makes a decision.
