giúp mình mấy câu này với 1. $\frac{That trust}{A}$ was repaid $\frac{with an}{B}$ offer no different from those $\frac{which}{C}$ had $\frac{all ready}{D}$ been refuesed 2. By $\frac{some estimates}{A}$ , 80 $\frac{percents of}{B}$ the world's language may $\frac{vanish within}{C}$ the next $\frac{centeries}{D}$ 3. $\frac{Starting with}{A}$ , the foremost problem $\frac{engendered}{C}$ by overpopulation is trafic $\frac{congestion}{D}$
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