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    Author Elizabeth Becker says we have a responsibility to respect the places we visit. Some basic rules still hold, such as not travelling at busy times and taking fewer trips but making them longer. The best and easiest way to be a responsible traveler is to use common sense and go local.

    Respect traditions. Read about the culture and traditions of the places you visit. Understand the local culture and customs to avoid making any mistakes or upsetting the local people. For example, dress properly when you visit temples and don’t eat or talk loudly in religious(宗教的)sites. It’s also important to respect the local environment. If you visit a beach, leave seashells where you find them and try not to catch fish while swimming.

    Learn the language. Nobody expects you to become fluent, but try to learn some basic phrases such as “please” and “thank you”. You’ll be amazed at how much nicer and more helpful people will be if they know you’re making an effort to get involved with their culture.

    Spend local. Stay away from international hotels and restaurants run by foreigners. By using local guides, buying local products and staying in family run hotels, you’re not only giving back to the community, but you also get a real sense of the country you’re staying in and the people who live there.

    Bargain fairly. Always be polite when you try to get a lower price. Sometimes goods at a local market can seem overpriced. Nobody likes to be cheated and it may be fun to bargain, but remember that for the local people bargaining it may not be a game. For some of them, their business is their only source of income. So try not to be too rude when bargaining.

    Don’t litter. In some countries, getting rid of waste is a big problem, so don’t throw rubbish on the ground. Doing so is harmful to the environment and unpleasant for others. Hold on to your rubbish until you find a bin.

    Save water. Even in some of the most developed countries, water shortages are a reality. Tourists who take 10-minute showers and leave the taps running aren’t making things any better.

下列关于遗传实验和遗传规律的叙述，正确的是（    ）

阅读课文 《推敲》片段，完成练习。

      接着，贾岛就把自己写诗的事告诉了韩愈，并说自己正在犹豫不决，不知道__________用“推”好。__________用“敲”好。韩愈也是一位著名的诗人，便很有兴致地思索起来，过了一会儿，他对贾岛说：；“还是用‘敲’字更好些。月夜访友，     友人家门没有闩，__________不能莽撞推门，敲们表明你是一个懂得礼貌的人。再说，用‘敲’字更能衬托出月夜的宁静，读起来也响亮些。” 贾岛听了，连连点头。

— Many people are worried that so many college graduates each year can’t find a job.
— There is no need to worry about it as the government is now making every _______ to provide more jobs.

探索新航路的著名航海家迪亚士说：“（海上探险）是为了像所有的男子汉都欲做到的那样，为上帝和陛下服务，将光明带给那些尚处于黑暗中的人们。”这反映了欧洲航海家开辟新航路的动力之一是