He plays the suona________.

题干

A：for three times

B：for third time

C：for the third time

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7﹣ $\frac{4}{15}$ ﹣ $\frac{11}{15}$	$\frac{5}{11}$ + $\frac{5}{7}$ + $\frac{2}{7}$ + $\frac{1}{11}$	$\frac{1}{6}$ + $\frac{5}{6}$ × $\frac{8}{15}$
18﹣18× $\frac{1}{6}$	$\frac{11}{12}$ ﹣ $\frac{3}{8}$ + $\frac{1}{12}$	$\frac{5}{9}$ × $\frac{16}{9}$ + $\frac{2}{9}$ × $\frac{5}{9}$