two weeks ago = for （　　）（　　）

two weeks ago = for （　　）（　　） He borrowed this book two weeks ago.=He _____ _____this book for two weeks. She borrowed my bike two weeks ago.同义句转换she______ ______my bike for two weeks. When have you bought the book?Two weeks ago.I have bought it for two weeks. She left here two weeks ago.She ___ ____ ___ for two weeks. Mr.Zhang left here two weeks ago.Mr,Zhang ___ ___ ___ for two weeks. I haven't seen her ()A.two weeks ago B.since two weeks C.for two weeks D.before two weeks选什么为什么?句意? He _____Tom two weeks ago. My uncle left for London two weeks ago.句意不变My uncle has ------- -------- London for two weeks. My uncle left home two weeks ago改写句子My uncle____ ____ ____ ____home for two weeks He borrowed this book two weeks ago.(改为同义句） He____ ____ this book for two weeks. He borrowed this book two weeks ago.（同义句转换）He____ _____this book for two weeks. My father went to Hong Kong two weeks ago.同义句My father has------- ------------ Hong Kong for two weeks. I bought this MP4 two weeks ago改同义句I ___ ___ this MP4 for two weeks He joined the football clud two weeks ago .(同义句)He __ __a __ __the foot clud for two weeks. I bought several books two weeks ago.（改为同义句）I --------- ---------- several books for two weeks. grounded for two weeks She had to be in hospitalA two weeks ago B for three weeks为什么要加for呢?