请帮我用英语造一下句“be serious about”“have a chance of doing sth”“spe

请帮我用英语造一下句“be serious about”“have a chance of doing sth”“spend time on sth”
“be serious about”“have a chance of doing sth”“spend time on sth”请尽量高深、长一点 ,有水平一点

1. He was serious about the matter.
他对于那件事很认真.
Do you think he is serious about leaving the company?
你认为他当真要离开公司吗?
. Do you think he is serious about leaving his wife?
你认为他真的想离开他的妻子吗?
2、So are those who think they have a chance of being rich in the future , by moving up the economic ladder .
因此是那些认为通过攀爬经济阶梯就有机会在未来变得更加富裕的人
Most of the prospective buyers were persuaded that they have a chance of winning contracts , with more than one -third of Iraq 's reserves up for grabs.
他们说服了多数的可能买主,机会赢得开采伊拉克石油储藏量三分之一以上的合约.
Only if he persuades his troops , his countrymen and the Taliban that America is there for the long haul does he have a chance of turning this war around.
如今,奥巴马只有让他的士兵,他的人民以及塔利班分子相信,美国将会把这场战争进行到底,他才有反败为胜的可能
3、we should spend some sime on english to welcome the 2008 beijing olympic games
我们应该多花些有些英语迎接2008年北京奥运会
I usually spend a lot of time on reading books.
我经常花很多时间读书.
Mr Smith is planning to spend time with his friends on weekends.
史密斯先生计划和朋友一起在周末度过时光.
你在这里选吧,希望能帮到你.