_____ he met with the terrible difficulty did he realize the importance of my advice.
—Hi,Torry,can I use your computer for a while this afternoon? —Sorry.________.
People who often stay up too late are more likely to die of heart disease,________ a study.
He picked up an envelope________50 dollars in it.
I didn’t hear the phone. I ________ asleep.
—Does he know how to work out the problem? —Yes,he has ________ a good idea to solve it.