3dmax欧式圆角吊顶建模:This is the first time that I had serious trouble with my boss.

This is the first two sections of the book. This is my the first time to Shanghai.有错误吗?应怎样改正?为什么? 完了 我的电脑出现了蓝屏 写着 If this is the first time..... 20,____you do this experiment,the first thing you should consider is safety. 我的电脑出现了蓝屏 写着 If this is the first time.....? This is the first time that I had serious trouble with my boss. If this is the first time you've seen this stop error screen,restart your computer. is this the reason ........????? who is the first to .... ---don't you know our town at all? ---no,this is the first time I ＿ here.