【推荐1】I don’t think playing ball games is ________   (simple) a waste of time,

【推荐2】Please give me some reference work. It will ________ my task. (simple)

【推荐3】When Tom heard the news that British Football Team lost a game again, he ______ (simple) couldn’t believe his ears.

【推荐1】A lot of young people took an ________ (积极) part in volunteering in the Asian Games.

【推荐2】Martin was too busy doing his ________ (兼职) job to have dinner with his friends last weekend.

【推荐3】根据句意和所给汉语完成句子。每空一词。
1. There were no more fish for ______ (渔民) to catch.
2. Even the ______ (底部) of the river was full of rubbish.
3. So far, no ______ (科学的) studies have shown that shark fins are good for health.
4. What are other _________ (优点；优势) of bike riding?
5. I never take ______ (木制的) chopsticks or plastic forks when I buy takeaway.
6. This is not only cruel, but also ______ (有害的) to the environment.