I don’t think David could have done such a stupid thing last night, ?
We ______certain livings as birds not because they have long legs or short legs,but because they all have feathers.
If no one ______ a coat with red buttons on it,I’ll have to keep it or send it to the Lost and Found.
The sports meet, originally due to be held last Friday, was finally _____ because of the bad weather.
—How about the book you are reading? —Good indeed. It ________many problems we have come across in our study.
A completely new situation will _________ when the examination system comes into existence.