题干
—Where is your father?
—He ______Shanghai on business for several days.
A：has been to
B：has gone to
C：has been in
D：has left for
答案(点此获取答案解析）
C
—Where is your father?
—He ______Shanghai on business for several days.
A：has been to
B：has gone to
C：has been in
D：has left for
2AlN＋3CO合成。下列叙述正确的是( )
