Was his father strict with him when he was at school? ——Yes. He had never praised him _____he became one of the top student in his grade.
A.fter
B.unless
C.until
D.when
正确答案是C
Was his father strict with him when he was at school? ——Yes. He had never praised him _____he became one of the top student in his grade.
A.fter
B.unless
C.until
D.when
正确答案是C