每日一题

Writing>Identifying Sentence Errors

The following sentence contains either a single error or no error at all. If the sentence contains an error, select the one underlined part that must be changed to make the sentence correct.If the sentence contains no error, select choice E.

Whether the Sumerians were the first people to develop writing is uncertain, but theirs is the oldest known writing system. No error.

(A) were
(B) to develop
(C) uncertain
(D) theirs
(E) No error

答案和解析

答案：E

解析：

There is no error in this sentence.