Question

1 What should I say? (he/ can't / think) 2 Where shall we go? (they / not sure) 3 Where do we put the sofa? (we /not know) 4 What should I write my home paper about? (I /have no idea of) 5 How should I start the engine? (no one / could tell)

Answer 1

1. What should I say? He can't think.
2. Where shall we go? They are not sure.
3. Where do we put the sofa? We do not know.
4. What should I write my home paper about? I have no idea.
5. How should I start the engine?  No one could tell.

Answer 2

1 He can't think 

2 They aren't sure

3 We don't know

4 I have no idea of it

5 No one could tell