Questions 1-4 refer to the following e-mail from a student to a teacher.

Dear Mr. Siemasko,

I (1)... sooner, but I've been so busy here in New Orleans. You (2)... that I'd forgotten to write! I've been very busy learning all about being a doctor. We're learning about the human body and all the different things that doctors to. It is important that students (3)... about these things if they're interested in becoming doctors in the future. Our teachers insisted that we (4)... our time studying when we get back to school. That's what i plan to do. I'll see you next week.

Sincerely,

Tony Morgan