at their parents are dead, the poor boy doesn’tknow ________ the money they left

Ellen was a painter of birds and of nature，________，for some reason，had withdrawn from all human society.(2012·浙江，17)

What bad weather!—Yes. The radio says it will be even ______ later on.

To take exercise indoors is less ________ than in the open air.[ ]

Don’t ______ personal information such as your name， telephone number and address until you feel comfortable.