People around the world are becoming more and more _____ about the population explosion.
A. concerned B. interested
C. involved D. disappointing
Bill was doing a lot of physical exercise to build up his ______
A. ability B. force
C. strength D. mind
The top leaders of the two countries are holding talks in a friendly_____.
A. atmosphere B. state
C. situation D. phenomenon
假定你是李华，你打算今年暑期邀请你的英国朋友 Joseph 到你的家乡参观游览。请你用英语给 他写一封邀请信，内容包括:
1.住宿安排在你家；
2.游览名胜，品尝小吃；
3.感受当地风土人情。
注意:
1.词数 100 左右；
2.可以适当增加细节，以使行文连贯。
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假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有 10 处 语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加:在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。 删除:把多余的词用斜线(＼)划掉。
修改:在错的词下划一横线，并在该词下面写出修改后的词。
注意:1.每处错误及其修改均仅限一词；
2.只允许修改 10 处，多者(从第 11 处起)不计分。
In recent years great changes have been taken place in my hometown. Ten years before, the small and low houses that lie on the north of the lake produced much waste. As the result, the lake was seriously polluted. To the west was a sandy field, what was the source of dust. Even worst, a brickyard on the southwest of the lake used a great deal good soil. Now the poor houses have been replaced by green trees but the brickyard by tall buildings. The sandy field the villagers used to dug and turn over is covered with fruit trees. Tourists from nearby towns often spend the weekend boat and fishing on the lake.
阅读下面短文，在空白处填入 1 个适当的单词或括号内单词的正确形式。
Why do many of us find 1. difficult or impossible to fall asleep in a bed other than our own? Is it because the bed is 2. (comfort)? According to a new study published in Current Biology, a significant reason is 3. the scientists call “first night effect”. They believe that one side of the brain acts as a “night watch” to warn us about potential dangers. It forces us 4. (stay) awake on the first night in a new environment.
For the study, 35 young volunteers 5. (ask) to sleep in a sleep lab for several days. Meanwhile, researchers watched their brain activities.
According to the researchers, on their first night, the left brains were 6. (active) than the right brains and people had a hard time sleeping. However, left-brain activity decreased as days went by, 7. (fall) even to the point of complete calm. In this process, the participants got an increasingly better sleep experience.
The 8. (finding) suggest that the different rhythms of the sides of the brain affect our sleep. When the two sides work 9. (different), the balance between them is broken. Thus, the brain can’t relax and is sensitive to anything strange in the surroundings, just 10. it is in the daytime.
