他们正在讨论环境问题 They are _____ the ____ about environment
问题描述：
他们正在讨论环境问题 They are _____ the ____ about environment
海伦打算开始一项业余爱好收集硬币 Helen is going to _____ _____ a hobby collecting coins
这次会议和健康问题有关 The meeting ______ _____ ______ _______ the problems about health
我们都共同喜欢一件事情 We all like one thing _____ ______ sufing the Internet
答
1 discussing problems /issues
2 set out / start with
3 is related to 确定四空?
4 which is确定四个空of this time involves