I made a promise to myself _______ this year, my first year in high school, would be different.
All witnesses _____ to the traffic accident are required to make their statements.
He apologized for ____able to inform me of the change about the plan in advance.
—Li Ping, your cousin speaks fluent English, like a native speaker. —No wonder. He once _____ in New York for two years as a visiting professor.
We will_____putting tents for victims in the earthquake as soon as we reach there.
No matter how frightened she felt, she had no choice but _____ there alone.