The food is not much. How long do you think it will _______?
With his son _____ , the old man felt unhappy.
It was funny that when _______ Mary began to weep sadly.
Have you ever had a case ________ somebody accused your reporter ______ getting the wrong end of the stick.
---How was the weather then? ---Hardly _____ off the plane when it started to rain.
It is a slow process to _______ a good knowledge of English.