By the 13th century, printing had developed further.

By the 13th century, printing had developed further.
A、到公元13世纪,印刷术已有了进一步的发展。
B、在公元13世纪,印刷术有了进一步的发展。
C、到公元13世纪,印刷术才有了进一步的发展。
D、在公元13世纪,印刷术才有了进一步的发展。
【正确答案】:A
【题目解析】:p27