When the teacher raised the question, no one in the classroom could give the answer _____ it. [ ]

Here are some books for _____ sister and _____.

3-junior high school life will be over . I will remember those things and teachers _____ are unforgotten .

Yao Ming is 2.26 metres tall. It’s very to find a bed big enough for him.

I’m really __________ playing ping-pong. No one can beat me in my class.