It is usually cheaper to have the goods ______ by sea than by air.
As we all know, the English language ________ the grammar and vocabulary that people from different countries and cultures brought to Britain.
— It was cloudy yesterday. —_________ today.
It is reported that the United States uses ________ energy as the whole of Europe.
It was along the Mississippi River _________ Mark Twain spent much of his childhood.
At the meeting place of the Yangtze River and the Jialing River __________, one of the ten largest cities in the world.