试题题干
Correct errors in the following sentences:
A river usually begins far up in the mountains or hill.
参考答案
试题解析
or是并列连词，所以前后两部分是一致的，又因为mountains是复数，所以应该把hill变为复数hills。
Correct errors in the following sentences:
A river usually begins far up in the mountains or hill.
or是并列连词，所以前后两部分是一致的，又因为mountains是复数，所以应该把hill变为复数hills。