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1) 1. is
2. are
3. is
4. are
5. are
6. is
7. am
8. is
9. are, are
10. is


2) 1. his
2. its
3. their
4. your
5. my
6. our


3) 1. these
2. that
3. those
4. this
5. this
6. that


4) 1. younger
2. nearest
3. more comfortable
4. the smartest
5. better
6. worse
7. the most famous