The numbers that researchers get from the experiments can be _______, just like number puzzles.

He wishes to make friends with ____ shares his hobbies and interests.

Sandy is upset now. Why don’t we -That’s a good idea.

Where did you get to know her—-It was on the farm ________ we worked.

What do you think of the four classics (名著) of China—They are wonderful, but I’ve read ______ of them.