为下列句子选择正确图片。

( ) 1. I'm going to the USA by plane.

( ) 2. They're going to the park by ship.

( ) 3. She is going home by subway.

( ) 4. She is going to school by bike.

( ) 5. He is going to work by bus.

( ) 6. Mike is going to take a trip by train.