1 . 似乎过了几个世纪，我终于看到他出现了，额头上满头大汗。
________, I finally saw he showed up with his forehead sweating heavily.

2 . 我要感谢这些年来为我们做了很多的老师和家人们。（定语从句）（汉译英）

3 . 我们经常在业余时间上网冲浪。（surf）（汉译英）

4 . Often working at night, the poachers shoot whole herds of antelope ________leaving only the babies, whose wool is not worth so much.

A．at one time

B．at a time

C．at times

D．at some time

5 . ______________________ (经过两个月的艰苦训练), I successfully became the champion of long-distance running in the city’s sports meet. (根据汉语意思完成句子)