заполните слово в скобках так, чтоб они грамматически и лексически соответствовали

Заполните слово в скобках так, чтоб они грамматически и лексически соответствовали содержанию текста.

1.Social historians argue about the birth of the modern fast food restaurant. There are certainly different definitions of "fast food" which makes it (TRICK) to be absolutely sure.

2.Although it is (POSSIBLE) to be definite, many historians go for Joseph Horn and Frank Hobart whose first outlet opened in Philadelphia in 1902.

3.But when they opened in New York, July 7th 1912 their shop "Automat" caused an (PREDICT)
sensation. They sold precooked food through small window opened by coin-operated slots.

4.Later on the two (RESOURCE) brothers opened a barbecue drive-in in San Berdino, California. It was a wonderful location and very popular but they discovered all their profits came from burgers, fries, coffees, shakes and coco cola.

5.So they closed for three months and opened again selling only these goods from a counter, served in paper packaging. Burgers at 15 cents each were hardly (EXPENSE)
.

6..Although some scholars may (AGREE) these brothers were probably the most important in fast food history. Their names were Richard and Maurice McDonald.