I hope I've got correctly that phrases in arrows (questions 3-10) mean that they are in bold. I it's yes, here are the answers. I'm not 100% sure that all of them are correct. Anyway, take a look:
1. Complex sentence consists of two parts. So the answer is <span>The car stalled as soon as I turned the corner.
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2. According to what I've mentioned before, the most suitable option is I wanted my gray suit because I look good in it.
3. I think that the word "very" is an adverb in this sentence.
4. I'm absolutely sure that the claus "that sweeps the floors" is an <span>adverb clause
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5. In my view the clause "that everyone must wait for you." is a <span>noun clause.
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6. This clause"<span>As soon as the stock clerks arrive" is 100% an adverb clause.
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7. Given clause "that he had left his license home" is a good example of a <span>noun clause.
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8. This clause "The jury stayed in the courtroom" is definitely a <span>noun clause.
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9. I believe that this clause "Who called my name" is an <span>adjective clause.
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10. I'm pretty sure that this clause "which are exposed to the elements" is also an <span>adjective clause.</span>
The sentence that best connects the two ideas is the first one: The park benches need a new coat of paint, so we should volunteer to paint them.
This is a complex sentence since it includes two clauses: an independent clause and a dependent clause.<u> They have been joined by means of the conjunction "so" to indicate that benches sould be painted as a result of knowing that they need a new coat of paint</u>. <u>"So" indicates a cause-effect relationship</u>. On the other hand, the other option do not make any sense since the clauses have been joined by "however", an adverb that is used to indicate contradiction, and "although", a subordinating conjunction that connects ideas that contrast. <u>The clauses contained in this sentence do not present ideas that contrast nor express a contradiction</u>; therefore, a conjunction that indicates cause-effect relationship such as "so" must be used.