将下列句子中汉语部分译成英语，注意使用适当的形式，并将所填单词写在相应位置。
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 get on well with others.(同时)
