It’s said that______ young people may lose their abilities to hear after five years if they listen to MP4 players which are too loud for more than five hours a week
| A．thousand of | B．six thousands |
| C．thousands of | D．six thousands of |
It’s said that______ young people may lose their abilities to hear after five years if they listen to MP4 players which are too loud for more than five hours a week
| A．thousand of | B．six thousands |
| C．thousands of | D．six thousands of |
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