跪求英文翻译 水平高的优先 不要在线翻译的

1,一个好老师能用简单地术语说明复杂的思想.
A good teacher is he who can make clear a complicated idea using simple terms
2,这一建筑的成本被估计为超过一百万.
The construction of this house is estimated to cost 1000000 yuan
3,真没想到能在这儿碰到你.
Fancy meeting you here. / It never occurred to me that I would meet you here.
4,大卫祝贺玛丽通过了这次考试.
David congratulated Mary on passing the exam.
5,这次运动会是由几个大公司赞助的.
This sports meeting is sponsored by a few big cmpanies