The best way to combine these sentence into one correctly complete one is to use semicolon. In general, semicolon is used in order to combine two sentences that share similar idea into one. It is needed to avoid repetition and redundancy. So the correct sentence looks like this: These trains were not toys; they were detailed models built to try out ideas for real trains.
The term sauté is a verb. So in a sentence it needs to be used as a verb. A verb gives the action in a sentence.
Question: Which sentence uses the word sauté correctly?
Answer: To begin, you will need to sauté the stew meat
Abstract nouns are words that name things that are not concrete. Your five physical senses cannot detect an abstract noun – you can't see it, smell it, taste it, hear it, or touch it. In essence, an abstract noun is a quality, a concept, an idea, or maybe even an event.
So the answer would be abstract.
Hope it helped :)
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