He started to learn English in 1990 and in the years ________ he kept on using it in his work.
In the United States, the black people on the whole __________ ahigh unemployment rate.
I tried my best to make this speech but many listeners __________ laughing as soon as I began.
I quarreled with my sister yesterday, but now I have already __________ with her.
Volunteers are always ready to help others and never want to ask for anything __________.
__________ the money I took along with me, I found it wasn't enough for a meal.