1. A:“I hope you will be ready to leave on time. ”B:“Don't worry. I'll be ready by the time the taxi ( ). ”A. arriving B. arrives C. will arrive D. will have arrived下面这个是什么时态,什么句形

问题描述:

1. A:“I hope you will be ready to leave on time. ”
B:“Don't worry. I'll be ready by the time the taxi ( ). ”
A. arriving B. arrives C. will arrive D. will have arrived
下面这个是什么时态,什么句形

B