题目内容
4.Usually,we don't know how important something is ______ we lose it.( )| A. | or | B. | until | C. | as soon as |
分析 通常情况下,我们直到失去了某物的时候,才知道它有多么重要.
解答 答案:B or意为"或者";until意为"直到…才…"常用于结构"not…until…"直到…才…;as soon as意为"一…就…".根据"we don't know"以及"______ we lose it"构成"not…until…"可知直到失去的时候才知道它的重要,所以要用until,故选B.
点评 首先要掌握or,until,as soon as这几个连词的意思,然后结合具体的题意做出正确选择.
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