31.  The task would be calculated to cost 15000 yuans.

32.  The task would be calculated to cost 15000 yuans.

33.  However, based on the application of Internet technology, online education will cost very much now in China.

34.  So I made a jerk towards the third concave, which cost my balance.

35.  For example, there was such a kind of this medicine costing 400 yuan each.

36.  "well ," I said, " in the neighbouring store it costs only one yuan per jin.

37.  Because it doesn't cost too much and is very convenient to take .

38.  Although it costs a lot of money.

39.  it only costs him a little money.

40.  I used to be very weak and I could not bear the sports costing a lot of energy .