The Chinese abacus(算盘), officially ______ as a cultural heritage at the 8th Annual UNESCO World Heritage Congress, is another symbol of Chinese wisdom.
--How is your cousin, Kate? --She broke her leg and ______ medical treatment since.
--Mom, may I play computer games just for a while? --______! Dad is writing his paper.
It took ______ building supplies to construct these energy saving houses. It took brains, too.
Though it is 20 years ______ we last met, I still remember the scene______ we got separated on a snowy day.
She is very dear to us. We have been prepared to do ______it takes to save her life.