Why don’t you buy an Audi instead of that car— I’d love to, but I can’t that right now.

下列各句中，表达得体的一句是（ ）

I like Renben supermarket best, because it isthe __________ of all.

The only time that we _____ to do something like doing some volunteer work was in the city of Philadelphia.

It was along the Mississippi River ____ Mark Twain spent much of his childhood.[ ]