[简答题]You______(本来不必进行) all those calculations. We have a computer to do that sort of thing.

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[单项选择]You ______ all those calculations ! We have a computer to do that sort of things.
A. needn’t have done B. shouldn’t have done
C. must not have done D. could not have done

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[填空题]We have no obligation to save those institutions which cannot reduce rising costs or increasing revenues significantly.

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[简答题]we __________ (本来不必叫邻居帮忙) yesterday, because we actually had enough hands.

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[填空题]All the teachers, (include)（）those who have retired, have been invited to the party to welcome the New Year.

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[单项选择]

We all laugh. We all hurt. We all make mistakes. We all dream, That’s life. It’s a journey. Please follow these rules to make the journey of your life a journey of joy!
{{U}} (62) {{/U}} positive through the cold season could be your best {{U}} (63) {{/U}} against getting ill, new study findings suggest.
In an experiment that {{U}} (64) {{/U}} healthy volunteers to a cold or flu virus, researchers found that people with a {{U}} (65) {{/U}} sunny disposition were less likely to {{U}} (66) {{/U}} ill. The findings, published in the journal Psychosomatic Medicine, build on evidence {{U}} (67) {{/U}} a "positive emotional style" can help {{U}} (68) {{/U}} off the common cold and other illnesses.
Researchers believe the reasons may be both objective as in happiness {{U}} (69) {{/U}} immune function and subjective as in happy
A. function
B. ability
C. response
D. reaction

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