___________, Mother will wait for him to have dinner together.

I think he must be writing his essay at home now, ______?

A．is he             B．isn’t he          C．do I              D．mustn’t he

What I want to know is ____ he likes the gift given by us.

—My son is addicted to drugs. He isn’t hopeless, is he?
—Yes, _____ he mends his ways and starts all over.

Before discussing different kinds of emotions, let us briefly talk about how researchers   1 bodily processes, actions and behavior, and how this relates to what we do in our daily lives when we observe emotions in  2  .
Bodily processes can be directly measured by   3  of a polygraph. (测谎器)When a polygraph is skillfully used to   4  how we react bodily with what we are   5 , it is called a "lie detector". Bodily processes can also be measured  6 . This is what we do when we observe someone blushing (脸红). However, we are not always  7  of what bodily processes respond to.
Measuring action   8  behavior is the other way researchers assess the emotions.    9 , one measure of fear of snakes is how  10 a person will go to the snake. Another procedure is to have a person  11  how afraid he is, or how he feels, in this way, researchers have 12  the so-called "fear thermometer" to assess a person’s fear.  13  our everyday living, we do very much the same thing. Only not too   14 . We react to what a person does, what he says, 15  he says it, and how he looks. Is he smiling? Is his voice trembling? We put all this  16  together to infer what a person is feeling.
  17 , we do not always act as we feel. Sometimes we do things that we don’t feel like doing.  18  we say we feel one way and then we act another. Actors, for example, successfully learn to "make believe" emotions, or learn to   19  them. Thus we   20  always tell what a person is feeling by what he says or by what he does.