完成句子 根据汉语意思完成英语句子，每个空格填一个单词。
好的成绩依赖于努力学习。
Good grades _____________ _____________ working hard ．
你在等谁？
Who are you ___________ ___________ ?
今晨又一架飞机从澳大利亚港口城市珀斯起飞去搜寻失踪的航班MH370。
Another Chinese aircraft ___________ ___________ from Australia’s port city of Perth early this morning to search for the missing flight  MH370.
雾霾使人们认识到必须采取措施来保护环境。
Smog makes people realize that something must ___________ ___________ to ___________ the ___________.