题目内容：

 

1.This is my_________________ time to come to China. So I feel very excited. ( one )

2.Don’t worry about the _________________ of your children. They’ll be OK ( safe )

3.If you want to get others’ help, you should also learn ________________ others. ( help )

4.A wise man will make more_________________ than the finds. ( opportunity )

5.He was so clever that he worked out the difficult math problem _________________. ( easy )