In the north people sometimes tie straw ropes (草绳) round the trees in winter to ______ them from the cold.

 It suddenly ________ me how we could improve the situation.

The children remembered to ______ themselves at first, but things went out of control minutes later.    

Here we introduce some of the best places to view spring flowers. So ________  some spring clothes and go to catch a glimpse of the true wonders of the season.

He was in hospital for a year. He felt as if he was from the outside world.