With 4G mobile phones, people can even see each other as they talk.—Really Would you show me it, please

In order to finish the research, the professor always _______, for every day the light in hisroom didn’t go out until 4 a.m.

From space, the earth looks blueThis is ____about seventy-one percent of its surface is covered by water

we have confidence and determination, we canwin the match.

r company going from bad to worse,the workers____________ hardly enough to make a living