题干
The boy is _________ young to know ________.
A：so; what to do
B： too; how to do
C：so; how to do
D：too; what to do
答案(点此获取答案解析）
D
The boy is _________ young to know ________.
A：so; what to do
B： too; how to do
C：so; how to do
D：too; what to do
