I enjoy my new life here. But I still miss my old friends from time to time. Here the underlined part means .

you swim？—No, I

Last year, I visited a chemical factory in Baise, there are about _____ workers in it.

What a pleasant surprise to see you here! Iyou Shanghai.—Me too. But I there next Saturday.

I called you at 4:00 yesterday afternoon, but no one answered.—Sorry, I ______ with my friends at that time.