4 . 但话说回来，总有一天，我会到达中心车站，和其他所有人会合。
______________, I’m certain that one day I’ll get to the main station only to meet up with everyone else.

5 . 现在是我们采取措施拯救我们地球的时候了，因为这是每个公民的责任。
_______________ our Earth as it is each citizen’s responsibility.

6 . 看起来有些青少年认为他们吸烟时看起来很酷。
_____________ some teenagers think that they look cool when they smoke.

8 . 据说他的新小说下个月出版。(be+过去分词+to do)
His new novel ______ next month.

9 . 你能节省多少二氧化碳，如果有的话，取决于你工作有多远,以及你是如何到达那里的。
How much carbon dioxide you save, ______, depends on how far you live from work and how you get there.