【例句演示】
    There are occasions when (on which) one must lie.
    Tianjin is the place where (in which) I was born.
    Is this the reason why (for which) he refused our offer?
    I want to go to the restaurant where we had dinner last time.
    This is the reason why I like this interesting book.
    I (will) never forget those days when I was in London.
    I miss the city where I grow up.
    The reason why he didn’t come is that he was ill.
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