短语讲解：

1. The town is in the middle of farm country.

in the middle of 在…的中间
例句：I was in the middle of the back row.
我在后排的中间。

2. Roads that pass through Gettysburg lead to Baltimore, Washington and other big cities.

lead to 导致; 把…带到; 领到
例句：That may lead to a serious split in our class.
那可能导致我们班的严重分裂。

3. This kind of artwork surrounds the people looking at it.

look at 看; 审视; 评判
例句：We must take a hard look at our finances.
我们应该密切注意财务问题。