B. Underline the nouns in the following sentences and write whether they are of masculine, feminine, neuter, or common gender:
1. May I come in, Sir?
2. Veena respects her teachers.
3. She is a doctor in this hospital.
4. The gate of this house is very strong.
5. This book belongs to Meena.
Fill in the blanks with the correct forms of the colored words.