美国担心中国月球探测器「玉兔」轧了阿姆斯特朗的脚印，会出现这种情况吗？如何保护人类在月球上的历史遗迹？
I'd use 'on' since a weekend is two times (or maybe more). 'At' is more particular, for a lesser spot or shorter time, whereas on/in are useful for extended durations or greater spaces. "Let's take in at an Italian restaurant at 9pm" versus "Let us eat in downtown on Friday".
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"I received this thermos for free" sounds correctly usual to me. "That thermos was for free" Seems negative: I would just say "That thermos was free."
But you will find an inclination toward plural arrangement when you have it as Element of a phrase where by another element is Obviously plural.
Within this context, "free" referred not to not becoming a slave but principally to not staying in jail or prison for committing a crime. Even today, most people incarcerated for crimes simply cannot vote. Previous to the fifteenth Modification towards the constitution in 1870, black Adult males could not vote for most states whether they have been free or not.
开学前日，小区有孩子想不通，从楼上跳下；到底是孩子变了，还是教育变了？
Hi Peter. That is interesting. I centered that exact position on a listing that features "to the weekends," albeit from the British supply:dictionary.cambridge.org/dictionary/british/weekend
多人带孩子近距离喂食藏马熊，藏马熊突然大吼，它大吼意味着什么？有多危险？若遇到攻击该如何逃生？
Realistic paraphrasings from the phrase free in this context are for almost nothing/for no payment. Evidently check here the phrase "for" cannot be omitted from Those people paraphrasings. Therefore Many individuals will mention that for free
It seems to me which the terms "free from" and "free of" may be used interchangeably. Do the two have distinctive meanings? Is yet another right than the other? Are there exceptions?
"Saturday" is a defined period of a typical device of time (days), if it comes about on Saturday, it occurs only on Saturday. While "at nine o'clock" indicates beginning at 9, but continuing for an versatile length of time; equally "at Xmas" indicates starting at some time during the Christmas period, not always "on Xmas Working day"; "with the weekend" indicates some point over the weekend which could possibly be Saturday or Sunday or both.
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