1. Teacher: So what do you know .......... prepositions?

2. Student: Well I know that they usually come .......... a noun.

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

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

5. Teacher: The thing to .......... is that in usually means inside a place or a position.

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

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

8. Student: Another problem is I don't understand .......... there are two words sounding the same --- T and one O and T double O.

9. Teacher: Good question. T and one O is the preposition and T and double O often means extra as in: This exercise is too difficult. And don't forget the third word also sounding the same --- the .......... two.

10. Student: Oh, no two is .......... thank you very much!