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第1题

This old man had to make his living by sell newspapers. (A) 对 (B) 错
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第2题

You’d better to work out this maths problem yourself. (A) 错 (B) 对
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第3题

They have been marry for about 20 years. (A) 错 (B) 对
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第4题

Modern machinery _______ been installed in this newly-built factory. (A) have (B) has (C) are (D) is
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