根据汉语完成句子。 People _______ _______ ______(和... ...握手)each other when they meet. Mary is _______ ________ ________(对我很友好)。 It was great ______ _______ ________ ________(收到你的来信)。 Thank you for _______ ______ ______ ________.(告诉我如此多) I enjoy ________ _______,(做运动)especially tennis.