They went by the sea应该没有THE吧?

They went by the sea应该没有THE吧? The next morning they went boating ( ）the sea. 辨析by the sea / at the sea near the sea 还是by the sea by the sea 于on the sea 《The House by the Sea》 they went to the beach by bike by bus We went to the west coast by ( ) sea,traveling by ( ) day. Nearly____of the earth____coverd by sea We went right round to the west coast by sea instead of 的中文 They went to the park by bus.改为同义句 They went to the park by taxi.(改为同义句)