She doesn't know when she can arrive to the airport改为同义句She doesn't know when she can arrive to the airport.She doesn't know ____ ____ ____ at the airport.
问题描述:
She doesn't know when she can arrive to the airport改为同义句
She doesn't know when she can arrive to the airport.
She doesn't know ____ ____ ____ at the airport.
答
when to arrive