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.