I can't open your file, Can you send it to me again? The words on the Blackboard are so small that we can't even see them. Don't worry, The child is so old that he can't be separated from his mother. The child is so young that he can't do without his mother. We cannot accomplish this task. pronouns interrogative pronouns How old is he? How many students are there in your class? How many people are coming to the party? How much has he done? Which movie do you like? Which book do you want to borrow? What country is he from? What is your favorite color? When are you free? Which day are you free? Which company? Which one do you want? Where are you going? Where is the station? Where do you live? Which ones are yours? Who went to the party? What have you bought? Which countries are there students in your class?