答案：B

题目分析：本句可改为陈述句为：it could be in the restaurant in which you had dinner with me yesterday that you left behind your keys and wallet.这里第一空是介词前置的定语从句，第二空是强调句型。故选B。句意：可能是在昨天你和我吃饭的那个饭店，你丢了你的钥匙和钱包吗？