15.My eye doctor gave me an eye exam ________ I had headaches and wondered if I needed a new prescription.
insert the word and
insert a comma and the word for
insert the word but
insert a comma
my answer insert a comma and the word for
Right.
To determine the correct answer, let's break down the sentence and analyze the context. The sentence structure suggests that there might be a cause-and-effect relationship between the two clauses. The first clause states that the eye doctor gave an eye exam, and the second clause suggests a reason for getting the exam (experiencing headaches and wondering if a new prescription is needed).
In this case, the phrase "for" is appropriate to connect the two clauses. It indicates that the eye exam was performed because of the headaches and the need to determine if a new prescription is required.
So, the correct answer is "insert a comma and the word for."
The revised sentence would then read: "My eye doctor gave me an eye exam, for I had headaches and wondered if I needed a new prescription."