21.From the first two paragraphs we can learn that___________.

　　A. every crew member is an expert in his field.

　　B. careful preparations and arrangements are quite necessary.

　　C. both the cast and crew must arrive at the same time every day.

　　D. every person should have his equipment while working together.

　　22.A director knows the purpose of each step of the work, but___________ .

　　A. he needn’t tell others about that

　　B. other members just follow his orders

　　C. he must have it known and well understood by others

　　D. others may have their own ideas and special ways of working

　　23.To shoot a film, a shooting schedule must be fixed first ______________.

　　A. but it may be crossed off if unnecessary 

　　B. but you needn’t work exactly on it

　　C. and each step must be carried out according to it. 

　　D. and no one can change it once it is settled

　　B

　　It has always been thought that alcohol causes people to put on weight because it contains a lot of sugar, but new research suggests a glass a day cold form part of a diet. Looking at past studies they found that, while heavy drinkers do put on weight; those who drink in moderation can actually lose weight.

　　A spokesman for the research team at Navarro University in Spain says, “Light to moderate alcohol intake, especially of wine, may be more likely to protect against, rather than promote, weight gain.” The International Scientific Forum on Alcohol research reviewed the findings and agreed with most of the conclusions, particularly that data do not clearly indicate if moderate drinking increases weight.

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