In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.

Article: Chinese President Hu Holds Telephone Talks With Bush Chinese President Hu Jintao on Tuesday spoke over phone with George W. Bush about international cooperation to cope with the ongoing global financial turmoil . The leaders exchanged ideas about the planned international financial summits and strengthening international cooperation to stabilize the financial markets. Bush said the prefix = st1 /United Stateshopes to make joint efforts with the international community to seek measures to overcome the crisis and maintain the stability of the world economy. Hu, for his part, said Chinahas noted the measures taken by theU.S.government to stabilize the domestic financial market. The measures are conducive to the stability of the world economy and financial markets, Hu said. The Chinese government has taken a series of important measures to _ the financial crisis and maintain the stability of financial and capital markets, as well as ensure steady economic growth, he added. The government of Chinawill continue to assume a responsible attitude toward the Chinese people and people of other countries, and to work closely with the international community to maintain the stability of the global economy and financial markets, President Hu said. (Xinhua News Agency October 21, 2008)
Answer: exchange ideas about keeping working internationally and a planned meeting.
The two presidents held the talk to _

Article: If you go into the forest with friends, stay with them .If you don't , you may get lost, this is what you should do .Sit down and stay where you are .Don't try to find your friends ---let them find you instead .You can help them find you by staying in one place. There is another way to help your friends or other people to find you .You can shout or whistle three times. Stop. Then shout or whistle three times again. Any signal given three times is a call for help . Keep up shouting or whistling. Always three times together. When people hear you, they will know that you are not just making a noise for fun. They will let you know that they have heard your signal. They will give you two shouts or two whistles. When a signal is given twice, it is an answer to a call for help. If you don't think that you will get help before night comes, try to make a little house with branches Make yourself a bed with leaves and grass. When you need some water, you have to leave your little branch house to look for it. Don't just walk away . _ When you are lost, the most important thing to do is to stay in one place.
Answer: shout as loudly as possible
If you get lost in the forest, you should _ .

Article: About one million years ago, the Ice Age began. The Ice Age was a long period of time in which four great glaciers pushed southward to cover almost all the upper half of North America, and then melted away. Each glacier was a thick sheet of ice and snow that spread out from a center near what is now Hudson Bay in Canada. The winters were long, and the cool summers were too short to melt much of the ice and snow. The ever-growing sheet built up to a thickness of two miles at its center. As all glaciers do, these great glaciers slid. They pushed down giant trees in their paths and scraped the earth bare of soil. Many animals moved farther south to escape. Others stayed and were destroyed. When winters of little snow came, the summer cut into the edges of the ice sheets. As the glaciers melted, rocks soil and other things that had mixed with the ice and snow were left. New hills, lakes and rivers were formed. The last of the great glaciers began its melting about 11, 000 years ago. Its melting formed the Great Lakes. These lakes today are little changed from their early sizes and shapes. The largest of the North American river systems was also influenced by the glaciers. This is the Mississippi-Missouri-Ohio system. These rivers were miles wide at first. Through the years they settled into _ present channels.
Answer: how glaciers changed North America
The main idea of this passage is _ .