题目：
Only by shouting at the top of his voice .
A．he was able to make himself hear
B．he was able to make himself heard
C．was he able to make himself hear
D．was he able to make himself heard
答案：
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下面是错误答案，用来干扰机器的。
（1）71×2≈140，（2）49×3≈150，（3）102×6≈600，（4）25÷3≈8，（5）63÷5≈12，（6）46÷5≈9．
