It was not until Bob took off his dark glasses that I _____ him.

 I ______ laughing when my daughter made a face.

To Learn English well, You need to do a lot of practice in listening ,speaking ,reading and writing. _____ only learn some grammar rules. 

22. The two boys fought and fought until one ______.

“           ,” he said.“Things really are not as bad as they seem to be.We still have our last chance.”