C.阅读短文,根据所给的首字母填入适当的词,使句子意思完整.We usually use two kinds of money.One kind is money made of paper and the other kind is money made of m_1________ .But in the past people used many things i_2______ of money.Some countries used salt,tea or stones(石头) .Other countries even used some animals.Today people in some p_3______ in the world still do not use paper money all the time.On the island of Yap,people use the h_4_____ money in the world---Yap stones.These are round,white stones w_5______ a hole in the middle.The Yap stones do not c_6_______ from this island.The Yap men have to go to the islands over 600 kilometres away to get t_7_____ .Rich people do not carry Yap stones.Servants(仆人) f_8_______ the rich.Each servant carries a stone on a long s_9_______ over his shoulder(肩).Today people on the island of Yap use paper money for everyday shopping.But for other things they still p_10______ Yap stones to paper money.