第6部分：完形填空(第51～65题，每题1分，共15分)
下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。
Animal’s“Sixth Sense”
51．A．therefore B．however C．although D．whatever
52．A．shelters B．foods C．disasters D．water
53．A．missed B．protected C．raised D．caught
54．A．such B．too C．so D．even
55．A．feel B．see C．hear D．sense
56．A．waves B．tides C．winds D．rivers
57．A．birthplaces B．playground C．reserve D．storage
58．A．experimental B．apparent C．scientific D．chemical
59．A．specialist B．assistant C．supporter D．sponsor
60．A．additional B．specific C．especial D．exceptional
61．A．modification B．detection C．assessment D．value
62．A．route B．behavior C．principle D．phenomenon
63．A．unwillingly B．occasionally C．doubtfully D．certainly
64．A．some B．much C．many D．few
65．A．on B．as C．for D．in