Did he leave for New York . . . . . . . . the month of July? A. for B. in C. from D. on

The correct answer is B. in.

The preposition “in” is used to indicate a period of time, such as a month, year, or season. In this case, the question is asking when the person left for New York, and the answer is that he left in the month of July.

The other options are incorrect because they do not indicate a period of time. The preposition “for” is used to indicate a purpose or destination. The preposition “from” is used to indicate a starting point. The preposition “on” is used to indicate a specific day or date.

Here are some examples of how the preposition “in” is used to indicate a period of time:

• I was born in 1990.
• The meeting is in an hour.
• I’m going to be in New York for a week.
• The leaves change color in the fall.