It was not until 1999 ( )their sovereign rights over Macao

题目

It was not until 1999 ( )their sovereign rights over Macao
A.did the Chinese resume
B.the Chinese people resturned
C.that the Chinese people resturned
D.that did the Chinese resume

答案

C
强调句it was .that 句型
这不是否定词置于句首的格式,不需要倒装.