a question at the front的用法和样例：
- Put a question mark at the end of the sentence.
- At the front of the house, someone had planted a beautiful garden.
- Put a question mark at the end of that sentence.
- "That student horselaugh answer way answered a question at the beginning:"I will be from high school to thing.
- A messenger was despatched to take the news to the soldiers at the front.