Trắc nghiệm: Modern (A) office buildings have (B) false floors under (C) which computer and phone wires (D) can be lain,Modern (A) office buildings have (B) false floors under (C) which computer and phone wires (D) can be lain.

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Modern (A) office buildings have (B) false floors under (C) which computer and phone wires (D) can be lain, Modern (A) office buildings have (B) false floors under (C) which computer and phone wires (D) can be lain.

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