I didn’t quite follow him because he explained the theory _____that is too abstract for me.
There is no doubt that _____ a goal, one needs not only knowledge but also good personalities.
In some places, red indicates sadness, as in South Africa, _______ it is the color people wear when they mourn.
The fans _____the names of the band members when they appeared at the airport.
He is really nervous. He ______back and forth all the night waiting for the results.
Mary _______as a secretary in this company for twenty years and now she stays at home taking care of her own garden.