o has returned from the UK recently He ______at Cambridge for four years, during which we ______ with each other on theInternet

Both of the skirts are in style this year. —Yes, but I think the green one is.

we’ve spent too much money recently.—-well, it isn’t surprisingOur friends and relatives______around all the time

I hear the government is going to ___ the air quality with the new standard PM2.5，isn’t it—Yes, ___ the air pollution will get more serious.

The question that puzzles them is ___they can finishthe work on time.