My teacher would look on this with terrified disbelief.

John trained to be an accountant.

I hope you don't see this as a waste of training time.

She tutors children in German.

He tutors his friend's children in maths for a smaller fee (is fee the right word here).

He trains future police officers.

He looked on their security system as a charade to make you feel protected.

If the dentist can't see you today, you should go to the hospital.

Unless the doctor had cancellations today, I can't make an appointment with him.

Would receptionist at a clinic say the same thing? E.g. "I can make/give you an appointment with the [name/doctor's speciality] for you")

I went to see my friend for a chat yesterday.

I went to see my friend at his place.

I went to my friend's place.

I went to the shopping centre to meet (up) with my friend.

The teacher's voice was monotonous and dry, so I was daydreaming throughout most of the class.

I was making less money at my previous job.

This job requires a lot of skills but the pay is quite good.