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选词填空
You will know the gift ____ Mother's Day.
A. for B. in C. on
听录音判断，正确的写
Jack doesn't know the answer.
将句子中的划线部分翻译成英语
了解安全守则很重要。
It's important to know the ______ rules.
听录音，填空
--What _____ is _____ of China? Do you know, Li Ming?
--Yes, I know! The _____ is east of China.
--- I don't know the meaning of this new word.
--- You should look _____ the dictionary.
A. up B. on C. at