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

2. and have had to use the local ________ .

3. Teacher: I understand what you ________ .

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

5. Student: Yes, I see I think I understand but you have ________ many tenses in English!

6. ________ I should have checked first since when I reached the shop I was led to believe that you were out for the day.

7. Yes, that's ________ for you to say.

8. If I do not hear from you by the end of this week I shall be forced to ________ legal advice.

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

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