—Were you in the library when Jack arrived there?—Yes, but I _________ soon afterwards.
—Which city is the first ________ plastic shopping bags? —As far as I know, it is San Francisco.
By the time Dave reached the small boat, a thick white fog _______ over the surface of the water.
At the root of volunteering is the idea ________ one person may have the ability to offer services that can help other people.
While many people are excited about these new technologies, these same technologies frighten others. Nowhere __________ truer than with genetically modified (GM) food.
I talked to my friend about it, and he’s __________ giving up the plan.