There was a robbery at the bank, and the police are looking … the matter. a. up to b. in on c. through. d. into

D.into

1. This house is the biggest house in our town.
2. This classroom is the largest classroom in my school. (large) 
3. This book is the worst  book in this library. 
4. Peter is the shortest  boy in her class.
5. Ann is the laziest girl in their class. 
6. This film is the best 
7. February is the shortest  month of the year. 
8. Russia is the largest  country in the world. 
9. This is  the most beautiful picture in my collection.  
10. He is  the best  driver I have ever seen.
11. This is  the most  difficult test. 
12. This is the most  interesting film I have ever seen.

Diana , Princess of Wales , born Lady Diana Frances Spencer (Diana, princess of Wales, Diana Francis Spenser) was, as we all know , the wife of the heir to the throne of Great Britain, Prince Charles , who is now a monarch , and bore him two crown princes William and Harry . Lady Diana came from an aristocratic family , of course, not royal , but it is well-known in Europe. Prince Charles met her when she worked in the " elite " kindergarten teacher. She immediately attracted the attention of the royal family and journalists , as Charles' friendship with such a bright woman could not escape the eyes of outsiders .
Charles soon realized his romantic feelings for Diana and decided to marry her . The wedding , held at St. Paul's Cathedral in London, was extremely lush and solemn .