题目内容：

1.If you learn to    difficulties, you will be the winner in life. (克服)

2.I often have a glass of        and an egg for breakfast. (甜牛奶)

3. People are not allowed to       in a museum.(拍照)

4.     is becoming more and more serious in today's world. (水污染)

5.As students, we should study hard,     it's important for us to gel on well with others. (同时)