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    Students these days often have a lot of worries. Sometimes they have problems with their schoolwork, and sometimes with their friends. What can they do about this? Some people think the worst thing is to do nothing. Laura Mills, a teenager from Washington, agrees.    "Problems and worries are normal in life," says Laura. "But I think talking to someone ____ a lot. If we don't talk to someone, we'll certainly feel worse "

    Laura once lost her purse, and worried for days. She was afraid to tell her parents about it. She even walked three miles to school each day because she didn't have any money. She just ____ thinking, "If I tell my parents, they'll be angry!" But in the end, she talked to her parents and they were really understanding. Her dad said he sometimes made careless mistakes himself. They got her a new purse and asked her ____ more careful. "I will always remember____ my problems in the future!" Laura says.

    Robert Hunt advises students about common problems. He feels the same way as Laura. "It is best not to avoid our problems. We should always try to solve them." He thinks that you can first find someone to talk to. This person doesn't need to be an expert (专家) like himself. Students often forget that their parents have ____ experience than them, and are always there to help them.

    In English, we say that sharing a problem is like cutting it in half. So you're halfway to solving a problem if you talk to someone about it!

生物圈中有着多种多样的生态系统，下列不属于生态系统的是（　　）

如图是印度不同季节季风活动图，回答下列问题：