______we don’t lose hope, there is still a chance for us to survive the snowstorm.
---Alice, why didn’t you come yesterday? ---I ____, but I had an unexpected visitor.
---Have you ____ some new ideas? ---Yeah. I’ll tell you later.
He suggested that she ____ the coat at home.
What great trouble we had ____ where his house was.
Not until I began to work ______ how much time I had wasted.