--- The MP3 cost me about 2,000 yuan. --- Well, it was crazy of you to spend so much money_____you could buy a cheaper one.
This morning Tom got up ealier ___ be late for school.
I have only one uncle, ____ I can turn to for help.
From the ___ expression on her face, we knew that the problem was ____.
The firemen arrived ___ the fire broke out.
This is the second letter that he has ___ him recently.