The answer is connected with the main use ______ the body makes of food— to supply the energy for movement.

Being a parent is not alwayseasy, and being a parent of a child with special needs often carries with_______ extra stress.

Jcaused serious damage toSino-Japanese bilateral contacts.

In the opinion of Li Ming, a science student in that high school, physics is_______ chemistry, but much easier than English.

My mobile phone has broken. I must _______.