Answer & Explanation:
1. D: The car started as soon as I turned the corner. A complex sentence has an <em>independent clause </em>, which is complete (The car started), and at least one <em>subordinate clause</em> (as soon as I turned the corner).
2. A: I wanted my gray suit (<em>independent clause </em>) because I look good in it (subordinate clause) formed a complex sentence.
3. C: Adverb. Very (it means 'to a great degree') is an adverb that is modifying (adding emphasis) the adjective <em>comfortable</em>.
4. A: Adjective clause. "that sweeps the floor" is a dependent clause used to modify the noun <em>crew</em>.
5. C: Noun clause. It is acting as the subject of the sentence. What is unfair?
6. B: adverb clause. Adverb clause of time using the subordinating conjunction "As soon as".
7. C: noun clause. Object of the verb claimed.
8. D : Independent clause. It is a complete clause, with a <em>complete thought</em>.
9. D : Independent clause. Complete thought; clause <em>stands on its own</em>.
10.A : adjective clause. It gives additional information about the noun <em>bleachers.</em>