1. Student: That's one I never understand ________ hard I try.

2. Teacher: Ah, you see in means you are there inside ________ into means you enter as: You go into the room.

3. Student: If I had to choose one, I would ________ in.

4. Teacher: Can you explain to me when you ________ the Past Simple and when the Present Perfect?

5. Teacher: Well if you started living in Paris in 1999 and you are still there, you say; I have been living there ________ 1999.

6. Teacher: Excellent. Now if I wanted to describe my time in Paris in 1999 with the verb 'stay', what ________ I say?

7. Teacher: Very good. Which do you find the ________ difficult?

8. no effort has been made to write to me and keep me ________ to date.

9. Student: I see. But what's the difference ________ in and into?

10. Student: Oh, that's easy. I say: I have lived here for 6 years. I can see from the ________ on your face I am right.