—What does the sign over there read?―“No person ______ smoke or carry a lighted cigarette,cigar or pipe in this area.”
Time is of no importance to great thoughts, ________ are as fresh today as when they first passed through their authors' minds, ages ago.
Willpower is a kind of quality, ________ is ________ it takes to do anything well.
________ nearly all behavior is learned behavior is a basic assumption ________ has been put forward by social scientists.
The British are not so familiar with different cultures and other ways of doing things, ________ is often the case in other countries.
________ some students are not aware of is ________ difficult life can be if they are not devoted to study.