If you like foreign food, why () that new Asian restaurant?

• A. Not try
• B. Not trying
• C. Not to try
• D. Not try it

Answer: (A)

The main idea being tested is the idiomatic construction why not + base verb, used to suggest doing something. In this sentence, the suggestion is to give the restaurant a try, so the verb should appear in its base form right after why not. That’s why the correct completion is why not try that new Asian restaurant. Saying why not trying that new Asian restaurant wouldn’t fit the common usage here, because the structure after why not takes the base form (try) rather than the -ing form (trying). Why not to try is not a standard construction in this context, and why not try it would replace the explicit restaurant with a pronoun, changing the meaning and sounding off with this sentence.