用whether 和 if 从句
1、is mr.black in the office [i asked]
2、will it rain tomorrow?[i wonder
3、does mr gray work in the school?[could you tell me]
4、has tin's fater worked as a doctor?[i asked]
5、did alice work out the maths problem?[i wonder]
6、have you water the flowers?[asked]
7、are they preparing for the mid-term examination?[he wanted to know]
8、they knew the story [the students ansered]
9、water freezes under zero degree the physics [teacher told us]