1 . __________ burdens you are having now on your shoulders, let it down for moment if you can. Life is short, so enjoy it. (用适当的词填空)

2 . When our vehicle was quietly running over the sand and small stones in the Sahara, it wasn’t long _________ we were surrounded by enormous sand dunes towering above us on all sides. (用适当的词填空)

3 . We were about to leave ________ one of our friends called and said he would visit us soon. (用适当的词填空）

4 . Laughing helps your body stay healthy and can even help you fight pain. Maybe this explains the long lives of men like Bob Hope and Gee Burns.________ the reason, research shows that in the end, the English saying,”laughter is the best medicine” may be true after all. (用适当的词填空)

5 . I was wondering whether to participate________ my teacher came by , telling me that it was a good chance to display my talent. （用适当的词填空）

6 . Before departure, the two young men agreed to meet there again twenty years later, ________ their conditions might be. （用适当的词填空）

7 . Everyone has the right to receive good medical care________ (不管、不论) his religion, colour, or age. (根据汉语提示完成句子)

8 . Word borrowing tends to happen ________ there is no suitable word for an object or idea in the native tongue. （用适当的词填空）

9 . ________ as Artemisinin（青蒿素） continues to serve as the foundation of anti-malarial treatment, numerous challenges have arisen in the further application and development of this family of drug. (用适当的词填空)

10 . He lacks organization when expressing his perspectives, ______ he has extraordinarily high intelligence and often comes up with creative ideas.(用适当的词填空)