_________ I come back before five o’clock–No, you________. But you can’t be back later than seven o’clock.

19.They talked about things and persons ___ they remembered in the school.

It was ______ the old clock that the old man spent the whole morning at home.

Can you believe that in ___ a rich country should be ___ many poor people?

In the US they focus on creative thinking skills, ________ in China they only focus on theory.[ ]