Grmmar

解题思路： 考查宾语从句的用法。宾语从句可以用that ,if/whether .疑问词来引导
解题过程：
1.The teacher told us that the sun rises in the east.
2He said that he would be back soon
3.whether ..have been ...or not
4.if liked .
最终答案：区别if /whether 引导宾语从句