His work _____ have been completed; otherwise, he wouldn’t be enjoying himself on the beach.

There are many factors that _________ thepopularity of the 3G cell phoneHigher speed of surfing the Internet is one

下列句子中的“过”字，意义不同的一项是（ ）

He is now playing football. It’s new one.

I think it is necessary for everybody to take action _______ the Earth.–I agree. Turn off the lights before we leave the classroom.