---- What do you think of the lecture made yesterday?---- Excellent! _______ you missed such a wonderful lecture?
63. Children can usually dress ______ by the age of five.
64.There is a photo on the wall.____ the photo of Lei Feng.
65.Is_necessary to tell his father everything?
66. Is_possible to fly to the moon in a spaceship?
67.I consider____ my duty to help you.