单项选择题
A．more than half a million B．at least 24 000 C．at least 80 000 D．more than a million
A．making a list of words you need and looking up the new ones in a dictionary B．spending half an hour studying the dictionary C．consciously using the words you recognize in reading D．trying to use the words you recognize
A．he was presenting the park with a diploma for its achievements B．he was concerned about how the park was being run C．it was the only national park of its kind in Europe D．it was the only park which had ever received a diploma from the Council