The use of vitamin _____ and herbs has become increasingly popular among Americans.
 
A.components  
B.materials 
C.ingredients   
D.supplements

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In most Western countries, few people use cash any more to pay for large purchases. (71)                    , they either write cheques or pay by credit card. Whereas cheques are deceasing in (72)          each year, the credit card has become increasingly indispensable. Many people now have several major advantages.
Paying by credit card offers (73)                     several major advantages. Firstly, you don’t have to carry around large amounts of (74)                    which could be stolen and is (75)                  to have in your pocket or wallet) or a large cheque book. Secondly, unlike cheques, you usually have several weeks in which to (76)  _____ pay. This is because of the way the system (77)                   . With a credit card, you receive a (78)       ___ from the credit card company or bank at the end of each month. If you (79)                    .  your purchase at the beginning of the month, you will have had several weeks of interest – free credit. You can then decide to pay the amount in (80)                    , and thus not be charged any interest at all, or to only pay a certain amount, delaying the remainder of the payment, at a high rate of interest, to subsequent months.
This, of course, can lead to one of the main disadvantages of credit cards. They give people the impression that they can afford to spend more than they actually can, resulting in their ending up with huge amounts of debt
_________(78)
A.fee
B.receipt
C.charge
D.bill

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 31 to 37.
You can usually tell when your friends are happy or angry by the looks on their faces, or their actions. This is very useful because reading their emotional expressions helps you to have a appropriate responses to particular situations and convey our intentions to others. But do raising the eyebrows and rounding the mouth say the same thing in Minneapolis as they do in Madagascar? Much research on emotional expressions has centered on such a question.
According to Paul Ekman, one of the leading researchers in this area, people speak and understand nearly the same “ facial language”. Studies by Ekman’s group have demonstated that humans share a set of universal emotional expressions that testify the common biological heritage of the human species. Smiles, for example, signal happiness on the faces of people everywhere. Ekman and his colleagues claim that people everywhere can recognize at least the following basic emotions : sadness, fear, anger, disgust, contempt, happiness and surprise. There are, however, differences across culture in both the context and intensity of emotional displays the so-called displays rules. In many Asia culture, for instance, children are taught to control their emotional responses, especially negatives ones, while many American children are encourged to express their feelings more openly. Another difference can be found when an American person understands a grin as a signal of joy, while on a Japanese face, it may mean embarrassment.
Regardless of culture, from their first days of life, children everywhere produce facial expressions that communicate their feelings. The abiltiy to read facial expressions develops early, too. By the age of five, they nearly equal adults in their skill at reading emotions on the people’ faces. This evidence all points to a biological underpinning for our abilities to express and intepret basic set of human emotions.
The text is mainly about ________.
A.Smiles – a signal of happiness  
B.A basic set of human emotions       
C. Paul Ekman – a leading researcher
D.Research on emotional expressions