It was in the lab_________was taken charge of by Johnson_________they did the experiment.

Was it not until you began to write ______ you should have remembered more words?

It is not how much we do but how much love we put into what we do ________ benefits our work most.(2011·陕西)

It was not until dark _____ he found _____ he thought was the correct way to solve the problem.

It was the training      he had as a young man     made him such a good engineer.