I could just see a car in the distance, but I couldn't ______ what color it was.
--How ___ your daughter ___ at university? ---She’s doing fine. Thank you.
Can you believe that in ___ a rich country should be ___ many poor people?
Mis Smith is a friens of ___.
--Has the train arrived yet?---No, it ought to ___ twenty minutes ago.
I didn't expect that so many people ___ to join in the work.