1 . 我不但能够提高我的口语，而且可以学习西方国家的一些习俗。
Not only ______________________________ but also I learn some customs in Western countries．

2 . 有些人浪费食物,而其他人却没有足够的食物吃。
Some people waste food ________ ________ ________ ________ ________ ________ ________.

3 . It’s also that they are on average healthier ________ more productive for longer.（用适当的词填空）

4 . 有些人浪费食物，然而有些人没有足够的食物。（while）
Some people waste food ______ ______ ______ ______ ______.

6 . 我喜欢唱歌，而她喜欢跳舞。
I like singing ________ ________ ________ ________.

9 . They kept their collection at home until it got too big ________ until they died, and then it was given to a museum. (用适当的词填空)

10 . Warming changes key characteristics of the ocean and can affect phytoplankton growth, since they need not only sunlight and carbon dioxide to grow, _________ also nutrients. (用适当的词填空)