Nowadays people can get much from TV and the Internet.

Science is _____ difficult for some students ____ learn, so many of them don’t like it.

Its population is almost ________ of the world’s population.

Wolves usually hunt ______a team and then they share their prey (猎物).

Mum,it is nice weather.I want to skate this afternoon.—Don’t you think the ice on the lake is too thin to________your weight?[ ]