Gary Locke , a Chinese-American, once______ as the governor of Washington for 8 years and now is U.S.Commerce Secretary.
The two sportsmen congratulated each other _______ winning the match by shaking hands.
Information has been put forward _______ more middle school graduates will be admitted into universities.
She stepped on my foot _______, not _______, which made me angry.
He had to _______ paying the bills because of a lack of money.
When she saw her son liked reading, she did all she could ______ him.