31. You see the lightning _____ it happens, but you hear the thunder later.
The days _______we spent together on the farm are not easy _______.
The boy is very poor. Could you offer him the old camera_______ ?
This was such a _______ test_______ few of the students could work out.
New books have been given out to the students, _______is happy with the books.
We _______of the decision until midnight.