Underline the correct form of the verb (Нужна правильная форма глаголов)

One day Robert Burns (1) was walking/walked near the sea. Suddenly he (2) heard/had heard a cry for help. He (3) was running/ran towards the water. Just then a sailor (4) was jumping off/jumped off a boat, and (5) had begun/began to swim towards the man who (6) were calling/was calling for help and saved him. The man who (7) saved/was saved was very rich. He (8) thanked/was thanking the brave sailor and gave him a shilling. By this time a lot of people (9) were standing/stood round them. They called the sailor a hero but the rich man (10) gave/had given him only a shilling. Burns (11) stopped/was stopped them and said, “Let him alone”. The gentleman (12) knows/has known better how much his life costs.

The famous author of detective stories, Arthur Conan Doyle, once (13) comes/came to Paris. He took a cab at the railway station to go to the hotel. “What hotel would you like to go to, Mr Conan Doyle?” asked the cabman. The writer (14) is greatly surprised/was greatly surprised. “How (15) do you know/has you known my name?” he asked.

“Well, it is simple. Yesterday I (16) read/had read in the newspaper that you would visit Paris. Then I (17) noticed/was noticed that your suit (18) is made of/was made of English wool,” the cabman said. “Wonderful! You (19) were/are a born detective!” said Conan Doyle. “Thank you, Sir,” the cabman said. “But another fact also (20) had helped/helped me” “What is it?” asked the writer. “You see, your name (21) is written/has been written on your luggage.”