3. Dry Ice changes to carbon dioxide at room temperature.
You see, sublimation is the transfer of solid to gas without a liquid in the process.
So, who are you, anyway? Or.. So, who are you anyway? Sure the first would be correct though.
Unclear because it makes the writer seem unsure about what he is talking about
The correct answer to your question would be... B. Them
Reasoning:
Them, is the students. Even though the actual word students is not mentioned "Them" is referring to that group of people making "them" the indirect object.
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Four challenges that could impact domestic tourism could include natural disasters like forest fires keeping people out of an area due to the danger to life and limb, social unrest such as in Venezuela right now with the violence of the right wing in Caracas especially, poor economy with high unemployment so that many people can't afford to travel even locally, and seasonal activities that can only be done in certain parts of the year like boating in the summer and skiing in the winter.
