The tomato juice left some _____ on a customer’s skirt, which made the waitress nervous.

______ will Tom agree to change his mind about going abroad for further study. 

Walking down the street, she noticed a long _____ of houses, all exactly alike.

Beijing Man used fire for cooking food and also for light, warmth and ________ wild beasts.

 It is a fact that there is a (n) _______ towards regional cooperation.