题干
－Where’s your father?
－He ______ Beijing. He won’t be back ______ next week.
－He ______ Beijing. He won’t be back ______ next week.
A：has gone to; until
B：has been to; until
C：has been to; after
D：has gone to; after
答案(点此获取答案解析）
A
的图象向左平移
个长度单位，再保持所有点的纵坐标不变
，得到函数
的图象，则使