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

my glasses?—Yes,I saw them on your bed a minute ago

__ by the policy, he decided to build a new factory.

Tom found out his parents weren’t well, so he went back to _____ for a while.

．—I haven’t seen Jack for three days, is he ill—_______. His mother told me that he was in hospital.