The government’s efforts to cut the homework burden of primary and middle school students _____ mixed reactions(反应).
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.
Some insects __________ the color of their surroundings to protect themselves.
We promise ________attends the party a chance to have a photo taken with the movie star.