The medicine should usually be kept out of the ________ of children at home.

It is widely reported in the western media that the drug ______ is now becoming a leading cause of teenager crimes.  

 It is important to have your eyes examined regularly to check for any sign of eye disease that may not have any ________.

 The moonlight was bright and about 15 yards up the road there was a deep ___ thrown by a tree.

4. Hiking by oneself can be fun and good for health. It may also be good for     building.