改错：Most difficult part of their trip were ...请问这句话有几处错。急急！！！

The most difficult part of their trip was crossing the "Great Amercan Desert" in the western part of the United States on horses and wagons.
这是我修改过的．供你参考吧

大错特错

正确应该是:

The most difficult part of theri trip is corssing the "Great Amercan Desert" in the west of United States by horse and wagon.

我觉得应该是The most difficult part of their trip was to cross the "Great American Desert" in the western part of the United States by horse or wagon.

The most difficult part during their trip was to crosee the "Great Amercan Desert" in the west part of the United States by horse and wagon.
我觉得正确的是这样，你看看有几处和你的不同吧呵呵

1. 首先必须在前面+the

2. were 必须改成was

3. 如果是was crossing the..也可以, 不过was to cross也可以.

4. in the weastern part of the unitied states 没错的.

5. 最后by horse and wagon 更合适.

The most difficult part during their trip was to cross the "Great American Desert&q