Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best completes the following sentence.

Most doctors and nurses have to work on a _______ once or twice a week at the hospital.

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Nowadays, people are searching for more ____ materials to build their houses.

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We need to act quickly to ____ to climate change, or it will be a disaster for the whole planet.

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She was walking to the library to borrow some books when she was seeing a robbery.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to the following question.

I didn't speak to Anita. I didn't see her.

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Although my parents are busy at work, they try to find time for their children.