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

2. Teacher: Absolutely perfect. Now what ________ the Present Perfect Continuous?

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

4. Teacher: Right ________ one more. Tell me which form you use if you are going to leave Paris and you tell someone about the length of time from your arrival till now.

5. Student: Yes, I want to be able to speak ________ .

6. Teacher: Well, if you ________ I could give you lessons next week.

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

8. From the end of May until August I have been away on business and was surprised that ________ that period

9. Teacher: I understand what you ________ .

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.