Ellen was a painter of birds and of nature，________，for some reason，had withdrawn from all human society.(2012·浙江，17)

We had a marvelous holiday: only the lasttwo days were slightly _____ by the weather.

The architecture in the town center is a successful ________ of the old and the new, and looks splendid.

It’s niceto see you again. What ______since we last met

The trade union intended to call on the workers to go on strike ________ the government’s limitation on exports[ ]