Not until most of the people had left the airport ___ his sister was there. （QE02-55）
A.that he saw B.had he seen C.did he see D.that he had seen正确答案C
Not until most of the people had left the airport ___ his sister was there. （QE02-55）
A.that he saw B.had he seen C.did he see D.that he had seen正确答案C
