为下列名词选择正确的定冠词“the”或“a”。
1. ___ man
2. ___ apple
3. ___ elephant
4. ___ sun
5. ___ girl
1. "The" man
2. "An" apple (Use 'an' instead of 'a' because 'apple' begins with a vowel sound.)
3. "An" elephant
4. "The" sun
5. "A" girl