Not until recently _________ the development of tourist-related activities in the rural areas.

With the development of science and technology, the prices of TV sets have _____.

I always have so many things to ________ when I comeinto the office after a trip abroad.

Betty, could you answer my question— Sorry, Mr. Green. I didn’t hear you. I _______about something else.

He was about to make a call to Tom _____ Tom patted me on the shoulder