16．听下面一段材料，回答22～25题．
22．When did the visitor pay his visit？
A．On a Sunday morning．
B．On a Sunday afternoon．
C．On a Sunday evening．
23．Where does Jack often go for a walk？
A．In the room． B．In the garden． C．In the park
24．Why didn't the visitor stop talking？
A．He wanted to make the dog angry．
B．He meant to make his friend happy．
C．He had too much to say．
25．What do we learn about the dog？
A．Very clever． B．Quite naughty． C．Not friendly．
