Bob is in a hopeless situation, ________ we should keep a close eye on.
I travel to the Binhai New Area by light railway every day, _____ do many businessmen who live in downtown Tianjin.
She’ll never forget her stay there ________ she found her son who had gone missing two years before.
Gun control is a subject Americans have argued for a long time.
She brought with her three friends, none of I had ever met before.
Whenever I met her, _________ was fairly often, she greeted me with a sweet smile.