题目内容：

用适当的关系词填空
1.The old man has three sons,one of __________is a famous doctor.
\x052．The result of the experiment was very good,________we hadn't expected.
\x053．The time isn't far away ________you will get high marks in the exam as long as you follow the teacher's words.
\x054．The Chinese government has decided to develop the west of China,________in my opinion will change those poor people's life.
\x055．The earth travels round the sun once every year,________is known to everybody.