______ late, he also forgot his books.

A．Not only he turned up

B．Not only he turned out

C．Not only did he turn out

D．Not only did he turn up

—Do you know ______ he is going to stay in Shenzhen?

—Sorry, I don’t know. Maybe a few weeks, but I’m not sure.

A．when

B．how long

C．what time

D．how soon