Question

改宾语从句1.He's going to start work at once.The teacher says.2.H

Answer 1

1.The teacher says (that) he's going to start work at once.

2.I know that he's a Canadian athlete.

3.I'm afraid that my family will leave for BJ.

4.I believe that he cannot finish his homework before 9:00.

5.I imagine that a lot of people will come to the Food Festival.

不知道有没有语境的要求.如果需要的话可以把第一句的动词改为过去时.