Playing on a frozen sports field sounds like a lot of fun. Isn’t it rather risky, _______

I shall never forget the day________Shenzhou was launched, ________has a great effect on my life[ ]

Do you need any help, Lucy——-Yes. The job is _________ I could do myself.

We were very tired and walked with difficulty，but we got home ______.

He told me that he would remember the days in Beijing University forever____ he got much help there from Professor Zhu