题干
Don't forget_________ when you get home.
A：to call back him
B：to call him back
C：calling him back
D：calling back him
答案(点此获取答案解析）
B
Don't forget_________ when you get home.
A：to call back him
B：to call him back
C：calling him back
D：calling back him
合成 
．（部分试剂和反应条件已略去）