I failed in the job interview and only then _____ the importance of learning English well.
—Hi, Tina ,we’re going to Sam’s house to celebrate his graduation. Would you like to ? —Great! Let’s go.
-It’s many years since I saw you last, I __________ you at all. -I wouldn’t have, either, if someone __________ you by the name.
When he looked up, he suddenly found himselfby a group of teenagers,
I really don’t know _________ I had my money stolen.
_________ the problem of land erosion getting more serious, the government is searching for a way to deal with it.