What is "American food"? To many people, American food means hamburgers, hot dogs, fried chicken and pizza. You might even think of apple pies or chocolate cookies. It's true that
Americans eat these things. But are these the only kinds of things you can find in America? It’s hard to find a typical(典型的) "American" food like Thanksgiving turkey(感恩节火鸡).The United States is a land of immigrants(移民).So Americans eat food a.      many different countries. When people move b.    America, they bring their cooking styles(方式)with them. So you can find almost every kind of food from other countries in America.
Americans love Italian pizzas, Mexican tacos(墨西哥炸玉米) and Chinese egg rolls(蛋卷).
But these foods in America don't taste quite like the original(原先的) ones!
What is a typical "American" food?
What do people from other countries bring to America?
在文中a, b两处横线上填适当的介词。
Do the food from other countries taste quite like the original ones in America?
文中these foods指代什么？