It was in the lab ______ was taken charge of by Professor Harris _______ they did the experiment.
What do you think is most ______ time to find him at home?
I’m sure your suggestion will ________ solving the problem.
______ _____the right decision _________ our future is probably the most important thing we will ever do in our life.
You can’t see through the telescope until it is _______ to your eyes.
Fashion, which differs from country to country, may reflect the cultured differences from one _______