IV. Give the correct word form of the following words.
1.   My father has a ............ computer. He often brings it with him when he is on business. (port) 

2.   The room will look more .................. if there is a picture on the wall.                            (beauty)

3.   You shouldn’t eat .................. food.                                                                                 (health)

4.   She often feels .................. when she get bad marks.                                                       (happy)