题目内容

 Not until we watched the Earth Day program on TV ________________ (我们了解) much about global warming.   (learn)

did we learn   
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Not until I began to work ________ how much time I had wasted.

A. didn’t I realize                              B. did I realize C. I didn’t realize                              D. I realize

It was not until she had arrived home _____ her appointment with the doctor.

 A. did she remember     B. that she remembered

 C. when she remembered  D. had she remembered

It is not until the disease has progressed to AIDS ____a person begins to look sick.

A．who             B．that              C．where            D．before

 

It was not until I came here ____ I realized this place was famous, for not only its beauty but also its weather.

A．who

B．that

C．where

D．before

 

It was not until dark ______ he found that it was the correct way to solve the problem.

A．that              B．what             C．which            D．when

 

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