We must keep our room clean. Dirt and disease go ____________, you know.

—How do you think of our new English teacher? — _____her clothes, she must be very strict.

At first ___ , the bag seems made of real leather, but actually it is just an imitation.

 Yao Ming _______ as a basketball star , and is loved by basketball fans both at home and abroad .

The time he has devoted in the past ten years ________ the disabled is now considered ________ of great value.