_____does your sister do She is a nurse.

Would you like to stay ____ days in Beijing—No, thanks. I’m afraid I’ll be back tomorrow.

I find this Math problem very _________ I believe the students can work it out _________ .

I don’t think our earth will be destroyed as described in the film 2012.- _____. It’s only a science fiction film.

Lin Tao has returned from the UK recentlyHe ______ at Cambridge for four years, during which we ______ with each other on the Internet