Nowadays a lot of teenagers have been _____ surfing the Internet.[ ]

Leo, I finally persuaded my mother.— Sowe can go to the basketball club tonight.

It was only _____ I read the poem ______ Ibegan to appreciate its beauty.

Have you seen the film The War Horsey—Of course, I have．It was in my hometown ______ it was made．

My sister was ________out at night.