I was wondering if...

This is a way to introduce a request. It makes the question sound really polite:

Hey Jen, I was wondering if I could borrow your textbook over the weekend.

I was wondering if you'd like to go out for coffee some time.

You say "I was wondering if..." even if you're still thinking about this question now. There's no grammatical reason for using the past tense ("was wondering"). That's just how the expression is said.

Yes, (sentence)

This is a polite way to start a telephone conversation with a business when you don't know the person you're talking to. You speak this way when:

• You call customer support.
• You call for someone at work, but someone else answers.
• You call to make an appointment with a doctor, dentist, hair stylist, etc.

(a doctor/dentist /hospital/etc.) takes (an insurance plan)

In the U.S., people have private health insurance plans that they buy themselves or get through their job. Different people have different insurance plans. Each doctor, dentist, etc. has certain insurance plans that they "take" (accept), and others that they don't take.

Because of this system, when you call a doctor's office to make an appointment, you have to ask "Do you take ___?"

Sometimes it's written on the doctor's website:

We take United Health Care and Emblem Health.

Empire Blue Cross Blue Shield

This is the name of a health insurance company.