Marker works outside and he is always ( ) about the health o

Marker works outside and he is always ( ) about the health o He always works late and we _____his health. he is always complaining about the weather The old man works hard because he is in poor health.(改错） the old man works hard becaus he is in poor health 单句改错：The old man works hard because he is in poor health. what is the difference between the infinitive marker to and It is c that he passed the exam,because he always works hard 英语The mother is always worried about her son's health.为什么那个是 Mr Brown is a good doctor and he always works h__.补单词 he is always complaining about. She sees a l____boy outside.He is about seven years old and