【答案】　C

　　Ⅳ.语法填空

　　阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

　　Wolves use many different types of communication.One way they communicate is through sound.The howl(嚎叫)is a well­known method wolves use 1.________(communicate)with each other.While howling，wolves often change their voices a lot.Some people think that wolves do that 2.________purpose，in order to fool others into believing that there are more animals present than there really 3.________(be)．

　　Wolves seem to howl for plenty of 4.________(reason)．They often howl before they go on a hunt，possibly to get the wolves together，and they often begin to howl after 5.________successful hunt.They do not，however，howl while they 6.________(hunt)．Besides，a wolf may howl alone if it is having trouble 7.________(find)its pack.

　　Wolves may also answer the calls of humans who are pretending to howl like wolves.They howl 8.________(little)often during May and June than they do during the rest of the year.This may be because that is the time that they are most likely to have young ones present.9.________is possible that wolves that have young ones don't want to be found by others，since pups are 10.________(easy)hurt.

　　【答案】　1.to communicate　2.on　3.are　4.reasons　5.a　6.are hunting　7.(in)finding　8.less　9.It　10.easily

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