The number of the people who can afford to buy their own house ______ more than 60%,but a number of houses _______.

Those who tend to _____ to their fate are sure not to make any achievements.

It’s easy for David to find the library because of his good ______ of direction.

It’s helpful to put students in a situation _______ they can learn how to cooperate with each other.

Jack, do you know the answer ______ this question It’s too difficult for me.— Sorry, I don’t know. You can ask Jim for help. He is good at math.