Step 1: Understanding the Question: We need to fill in two blanks in the sentence with the correct preposition and verb form. The sentence describes events that happened in the past.
Step 2: Detailed Explanation: Analyzing the first blank: The phrase "started his career ____ the age of 15" requires a preposition to indicate a specific point in time (age). The correct preposition to use with a specific age is "at". So, the phrase should be "at the age of 15".
Analyzing the second blank: The main clause "A well-known chef, started his career..." is in the simple past tense ("started"). The action in the subordinate clause ("when the prodigy ____ cooking...") also occurred at the same time in the past. Therefore, the verb in the second blank must also be in the simple past tense. The simple past tense of the verb "begin" is "began".
Evaluating the options: - (A) in, has begun: "in" is an incorrect preposition, and "has begun" is present perfect tense, which is incorrect.
- (B) to, have begin: "to" is incorrect, and "have begin" is grammatically incorrect.
- (C) on, begin: "on" is an incorrect preposition, and "begin" is the present tense form.
- (D) at, began: "at" is the correct preposition, and "began" is the correct simple past tense verb.
Step 3: Final Answer: The correct pair of words is "at, began", making the sentence: "A well-known chef, started his career
at the age of 15 when the prodigy
began cooking under Eric Ripert at the iconic New York restaurant."