Let's identify the sentences that contain errors related to punctuation, grammar, or quotation marks:

a. Mr. Smith said to me, “Where are you going on your vacation this year?” ✅ (Correct)

b. She said, “Did the mechanics finish repairing your car?” ✅ (Correct)

c. She said, “Why David been looking so miserable lately?” ❌ (Error: Should be "Why has David been looking so miserable lately?")

d. I asked my friend, “Was anyone hurt in the car accident last month? ❌ (Error: Missing closing quotation mark. It should be "I asked my friend, 'Was anyone hurt in the car accident last month?'")

e. She asked me, “How old are you now?” ✅ (Correct)

f. He said to her, “Have you been to town today?” ✅ (Correct)

g. Jonh said, “How long does it take you to get to London, Mary?” ❌ (Error: Name should be spelled "John" and there’s an unnecessary space before the comma after "London.")

h. The policeman asked the little girl, “What’s your name?” ✅ (Correct)

i. Mr. green said to his secretary, “Who did you talk to a few minutes ago?” ❌ (Error: "green" should be "Green".)

j. Paul said, “Can you swim, Mary?” ✅ (Correct)

k. She asked her son, “Do you know which is the cup you used?” ❌ (Error: Should be "Do you know which cup you used?")

l. Helen said, “What did you say, Jack?” ✅ (Correct)

m. She said to him, “Why didn’t you get up early this morning?” ✅ (Correct)

n. He said, “Will it rain tonight?” ✅ (Correct)

Here are the sentences that contain errors:

- c: "Why David been looking so miserable lately?" ➜ Corrected version: “Why has David been looking so miserable lately?”
- d: “Was anyone hurt in the car accident last month? ➜ Corrected version: “Was anyone hurt in the car accident last month?”
- g: Jonh ➜ Corrected to John, and "London ," should be without a space.
- i: "Mr. green" ➜ Corrected to "Mr. Green."
- k: “Do you know which is the cup you used?” ➜ Corrected version: “Do you know which cup you used?”