If someone invites you to go to his party,but you have no time, what should you not say__________

He said that light ______much faster thansound.

I can’t find my dictionary.—-_______ you put it in that bag.

下列选项中全部都有通假字的一项是①夫子矢之曰 ②鼓瑟希，铿尔，舍瑟而作③以吾一日长乎尔，毋吾以也 ④子路不说⑤道之斯行 ⑥斯人也而有斯疾也⑦一箪食，一瓢饮，在陋巷 ⑧君子一言以为知

Understanding the cultural habits of another nation，especially ________containing as many different cultures as America，is a difficult thing