题目

My 14-year-old brother John dreamed of having a black woolen coat, for at that time this kind of coat was   31   with teenagers, but it could cost several hundred dollars. One day my brother and I went into a shop and saw a black woolen coat at the same time. The coat felt very soft, and it cost only ＄28. It was   32   but so nice. We looked at each other, saying nothing, but John’s eyes shone.        John tried on the coat and   33   it at once. John wore the coat to school the next day happily and came home with a big   34  . “How do the kids like your coat?” I a8．能与$\frac{2}{3}$：$\frac{4}{7}$组成比例的是（　　）A．0.6：0.7B．$\frac{7}{10}$：$\frac{3}{5}$C．$\frac{5}{12}$：$\frac{1}{3}$