题目内容
10．-Dad，I'm afraid that I can't do it．-Take it easy，dear．You'll never know it __________ you try．（ ）
| A． | after | B． | since | C． | when | D． | until |
分析 --爸爸，恐怕我做不了那件事．
--别紧张，直到你尝试了你才会了解它．
解答 答案：D．
联系语境并根据前后句子的对比，可知答语应理解为：别紧张，直到你尝试了你才会了解它．； 由此可以判断出此句应用固定表达not…until来完成，意为"直到…才…"引导一个时间状语从句．故选D
点评 本题主要考查连词的用法，做此类题目一定要弄清句意，明白上下文之间的关系，才能更好地判断出所要用的连词．再就是要熟记固定短语和句型．
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