We all know that we’ll meet all kinds of difficulties in our lives in the future. We should learn to be ________ any challenge!
________his surprise,Lisa was the new student in his class.He got to know her ten years ago.
She was badly ill.We were all worried________her health.
We will write a letter to you as soon as I________free time.
We heard someone________in the next room.
________our surprise,he went out of the forest by himself.