2 . The new hybrid grains are firmer than natural grains, and when ________ (cook) they maintain their traditional appearance. (所给词的适当形式填空)

3 . I’m not certain ________ happened afterwards, but for that brief period, we two vastly different species connected, bridging  the gap between us through songs. (用适当的词填空)

4 . I learned this while ________ (take) care of a seagull unfortunate enough to swallow a hook. (所给词的适当形式填空)

5 . Music is a sweet language to show love to those who love us and those who ________ (love) by us. (所给词的适当形式填空)

6 . It is used in products from cups that keep your drinks hot or cold to packaging materials ________ protect items during shipping. (用适当的词填空)

7 . Study co-author Wei-Min Wu says that in 24 hours, the plastic ________ (turn) into carbon dioxide. (所给词的适当形式填空)

8 . The U.S. Environmental Protection Agency ________ (say) it is the fifth largest creator of dangerous waste. (所给词的适当形式填空)

9 . So about the age of Western women, my advice is ________ if you don’t know it, don’t ask about it; if you really know it, don’t mention it. (用适当的词填空)