根据所给汉语提示完成句子。
1. 他努力学习,以便能够赶上其他同学.
He works hard so ____ he can ____ __ with other students.
2. 我爷爷在十八岁时开始工作.
My grandfather began to work ___ ___ ___ __ 18 ．
3．同学们正在一个接一个地上公共汽车.
The students are getting on the bus ___ ___ ___.
4. 如果明天不下雨,我们就去公园.
If it ___ ____ tomorrow, my family willgo to the park.
5. 越活动你的脚,你就会越健康.
___ ___ you move your feet, ___ ___ you will be
