用once完成句子。1. I have only been there ____. 我只去过那儿一次.2. _____you understand this rule, you will have n

题目简介

用once完成句子。1. I have only been there ____. 我只去过那儿一次.2. _____you understand this rule, you will have n

题目详情

用once完成句子。
1. I have only been there ____  .
    我只去过那儿一次.
2.  _____ you understand this rule, you will have no further  difficulty.
     一旦明白了这条规则,你就再也没有困难了.
题型:填空题难度:中档来源:同步题

答案

1. once    2.  Once

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