China’s new food law provides for a food recall system _______ producers have to stop production if their food isn’t up to standards.
The boy became fatter and fatter each day and __________ made his parents sad.
The secretary worked late into the night, ________ a long speech for the president.
When we were young, every evening my brother and I ______ stay at home waiting for our mother.
She spends her money _________ books _________ on clothes.
—Have you heard the story of “The Merchant of Venice”? —No. When and where does the story ______ ?