Though measures have now been taken to prevent further price hikes, many people remain _______ over the rising cost of food. 

For little kids, drawing is ____.

Greenland, ＿＿＿＿＿island in the world, covers even two million square kilometers. 

Doctors say that exercise is important for health, but it must be        exercise.

 I think nobody makes  _______ contributions to the company than him.