Choose a suitable word or phrase (marked A, B, C, or D) to fill in each blank.

As an _______, Mr. Pike is very worried about the increasing of juvenile delinquency.

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He has been very interested in doing research on _______ since he was at high school.

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Are you sure that boys are more _______ than girls?

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John cannot make a _______ to get married to Mary or stay single until he can afford a house and a car.

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It was such a boring speech that I felt _________.

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My mother used to be a woman of great _______, but now she gets old and looks pale.

Choose a suitable word or phrase (marked A, B, C, or D) to fill in each blank.

The more _______ and positive you look, the better you will feel.