If parents have children help with housework, the children will feel needed. ______, they will learn to take care of themselves.
This is the first time for him to ______ your beautiful country.
I can hardly believe my eyes. What a poor composition you have ______! There are so many wrong spellings in it.
The truth, sir, is that the old man _______ across the road when my car hit him.
To find the street where I lived in my childhood is no easy task because the city ______ so rapidly all these years.
----She must have gone back to the valley. ----No, she _____. The entrance to it was nowhere to be found. A mustn’t B needn’t C couldn’t D hadn’t