thu46561 2/22/2025 9:56:55 AM

Câu 607:

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

The gap between _________ rich and _________ poor in developing countries is a very big problem to solve.

        A. x/x        B. the/a        C. a/a        D. the/the

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