按每小题后的要求转换下面的句子。

1. The early flight will take off at 4:20. (对画线部分提问) 

     ___________________ will the early flight take off?

2. The Grand Canyon is 1. 6 kilometers deep on average. (对画线部分提问) 

    ___________________ is the Grand Canyon on average?

3. She usually walks to school every day. (改为同义句)

    She usually goes to school ___________________ every day.

4. Little Tom is proud that he does well in math. (改为同义句) 

    Little Tom is proud that he is ___________________ math.

5. There are over 500 students joining in the exam. (改为同义句)

    There are over 500 students ___________________ in the exam.