一道英语词语替换题,

His parents employed a teacher to teach him math at home
They provide me with some history books when I was busy preparing my paper
I got a chance to go abroad
Mark overcomes the difficulties by working hard
The armies are now ready to meet each othe

1、直接换成teacher 2、They provided me with some……
3、a chance 4 换成overcame 5 直接换成meet