---Is there ___ you don't understand?---I think ___ is quite clear.Thank you.
-- I’d like to have a picnic tomorrow. --- _________. We’re too busy these days.
--I'm sorry I made a mistake! --. . Nobody is perfect.
One can always manage to do more things, no matter______ full one’s schedule is in life.
The police were seeking more information to find out________ killed the rich merchant.
Had they known what was coming next, they _________second thoughts.