15. Choose the correct form of the pronouns in brackets.
1. It may be (our, ours) dictionaries. 2. He hasn’t read a line of (your, yours). How can he
criticize? 3. His composition is much more interesting than (your, yours) or (my, mine). 4.
(Their, theirs) knowledge of the subject isn’t better than (our, ours). 5. I’m afraid they will
take (her, hers) advice not (your, yours). 6. All our clothes were very dirty, especially (my,
mine). 7. Will you help me to sort out the things? I cannot tell which are (your, yours) and
which are (my, mine). 8. This is (your, yours) copy-book, but where is (my, mine)? 9. My
sister likes much sugar in (her, hers) tea, but I like little in (my, mine). 10. The friend of
(their, theirs) is very intelligent.

1. It may be our dictionaries. 2. He hasn’t read a line of yours. How can he criticize? 3. His composition is much more interesting than yours or mine. 4.  Their knowledge of the subject isn’t better than ours. 5. I’m afraid they will take her advice not yours. 6. All our clothes were very dirty, especially mine. 7. Will you help me to sort out the things? I cannot tell which are yours and which are mine. 8. This is your copy-book, but where is mine? 9. My sister likes much sugar in her tea, but I like little in mine. 10. The friend of theirs is very intelligent.