Not until three years ago ______ to work overseas

Not until it was completely dark______working.A．had they stoppedB．they stoppedC．they didn"

What apparently had happened, three years ago, was that Kate _____ to a different buildi

Not until I began to work did I realize how much time I______.A．wastedB．have wastedC．was w

We will be losing money this year______our new plan works well.A．ifB．unlessC．sinceD．until

The reintroducing experience three years ago shows that man－raised parrots ______. A.

His political ______ came to an end 20 years ago.