【单选题】【消耗次数：1】
Mary Kingsley____________ twenty months between 1893 and 1895 exploring West Africa.
①
spend
②
spends
③
spended
④
spent
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【单选题】
Mary Kingsley believed that Africans could learn technology____________ and would finally move into the modern world.
①
gladly
②
carefully
③
possibly
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gradually
【多选题】
------ Why did she visit Africa?------ She went there____________________ .
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for research work
②
to do research
③
to gather information
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to collect information
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在javaScript中，下列选项中能够得到最后一个“Mary”的是（） var str=“this is Mary.She is Mary”;（选择二项）
①
var i=str.substring(str.indexOf(Mary,13));
②
var i=str.substring(str.indexOf(Mary,13),str.length);
③
var i=str.substring(str.indexOf(Mary
④
var i=str.substring(str.indexOf(Mary),str.indexOf(Mary)+4);
【单选题】
It was in the countryside ________ I spent my childhood.
①
where
②
place
③
when
④
that
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