After walking on the zigzag path to the mountain top for a few hours, the tourists gathered under trees ________ shade and ________ down to have a rest.

There are varieties of programs in the TV station to ________ many different types of interests and tastes among the public.

If your friend comes here with any more criticism about how we bring the children up, I'll tell him to ________ his own business.  

The little boy found his toy you _____ under the bed.

(安徽省马鞍山市2009届高三第一次教学质量检测)The brackthrough       by scientists in Shanghai,gives hope to cancer patients all over the world