爸爸认为行,但你必须先完成作业,他这样说:
Sure, you ____. But you have to ____ ____ ____first.
一 Which of the places can you visit in the UK?
一 .
乘坐飞机的乘客在飞机起降时最好张开嘴,或闭嘴和堵耳,这种做法主要是为了( )