题目

造成海陆变迁的主要原因（   ） A.地壳的变动和海平面的升降    B.人类填海造陆 C．人类围湖造田              D.人类退耕还湖 答案：A阅读下面短文，在空白处填入一个适当的词，或填入括号中所给单词的正确形式。Everyone should learn how to keep safe. If you follow the advice below, your life 【1】(be) much easier. Always keep an eye on the environment around you. Never walk alone outside 【2】 the evenings. When in a theater, make sure you know where the exits(出口) are. It can help you get out of the places as 【3】(quick) as possible. When you carry 【4】 bag with you in crowded places, you'd better keep it in front of you. Or someone might take away all the 【5】(thing) from your bag. If a stranger(陌生人) follows you, walk 【6】(cross) the road or go to another way. You should 【7】(remember) not to go home at once. You're much safer in the street 【8】 you're alone at your home. If you have to take a bus, try 【9】(arrive) at the stop a few minutes earlier before the bus leaves. Don't fall asleep on the bus. Be sure to look after 【10】(you). Safety comes first.