The whole area of the national and local governments tried to wipe out rats to prevent the spread of disease.

BSection B/B

None of us expected the chairman to______at the party. We thought he was still in hospital.

When someone asks you to his or her home, it is very clear who is the guest and who is the host, but invitations to restaurant for lunch, dinner, coffee, a drink, etc,【B1】______, and the customs vary in different parts of the United States. In many instances it is the inviter who pays, as one would expect, but in some instances each one pays his or her own check; You "【B2】______" This is often the case with friends in informal situations, such as "Let' s go get a beer" or "Want a cup of coffee?" In some parts of the country, however, some people like to【B3】______by taking them to a restaurant for a dinner instead of having dinner at home. In this case, the host expects to pay and the guest may offer to leave the tip, which【B7】______by the host. If so, just let the matter drop. If the invitation is expressed【B8】______, such as: " Let' s go to a Greenwillow for dinner," it may be more of a suggestion than an invitation, so you should be prepared to pay【B6】______ If you want to invite somebody for a meal at a restaurant, be explicit; "I'd like to take you to Greenwillow. " Americans should be【B7】______, but they often assume you know the local customs in the matter. Ask a friend' s advice if you are not sure.

But diets that restrict certain food groups or promise unrealistic results are difficultor unhealthyto sustain over time.

BSection B/B

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BSection A/B

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What does the man has come to do?

Smokers are more prone to osteoporosis, a major cause of fractures in old people, particularly post-menopause women.

Babies need to be held and soothed when they are disturbed or hurt.

These statues are the only evidence of a once great civilization.

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Not until the advent of biochemistry could the anatomist see through the microscope which cells carry specific enzymes or gauge how active these enzymes are in different cells under various conditions.

When you go sun-bathing, you must wear sun-glasses to______eyes from the strong ray.