________ we ________ much longer, we might not even have had the spot on the rooftop.

I would love ______ to the party that evening, but I had an unexpected visitor．

— Look! How long _____ like this?　  — Three weeks! It’s usual here that rain _____ without stopping these days of the year.

—— Was the driving pleasant when you went to Mexico last summer? —— No, it ＿＿＿＿ for four days when we arrived, so the roads were very muddy. 

A lot of attention ______ to greenhouse gas emission. Look at those environmental posters.