Решите пожалуйста номер 8,51 и 8,52

1. a group of people; the guide; some pictures; to show
2. the gardener; to ask; i; to help him; in the garden
3. the students; the engineer; a model of a new car; to demonstrate
4. Pavlov; to present to; the Cambridge students; a toy dog
5. to water; mother; the flowers; every day
6. we; tomorrow; to bring; the books
7. IN THE 19-TH CENTURY; this book; he; to write
8.the fence; to whitewash; Tom Sauyer.