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.

14. Over the long process of evolution, animals have developed their ______ senses, which makes it possible for them to _____ their environments.

physics, he likes maths better.

You can _______the cake _______ten pieces.

The living room is clean and tidy, with a dining table already ___ for a meal to be cooked.