.I don't remember how many years ago ______ people began to grow crops.
Marie Curie paid no attention _____ the prize that she won because of her achievements in physics.
We will wait for further information, you should keep us ________.
These houses are sold at such a low price _______ people expected.
She _______ me ______ her parents as I met them for the first time.
Only by hard working can you _______ the goal.