______to the Internet ,as many adolescents do ,will to some extent have a negative effect on their mental and physical health .

I can’t thank you ________ much becausewithout your help I ________ have won the first prize.

Do you know _________ ——Yes, I do. He went by skateboarding!

You see how thin Ann is!——She ______ gain some weight but she______ toolittle.

s a lucky number, ________ I suppose, that willbring us luck and fortune and will be loved by us all