Those who failed to get into the art exhibition ________ disappointed as many of the artists who should have appeared did not come.
It was in the United States that I made the _________ of Professor Jones.
Many experts stick to the view _____ teacher development is _____ the key to quality education lies.
I have to go to school by bus because my bicycle _____.
The course books are _____ by four tapes, which are beneficial to beginners.
— I’m afraid what I did cannot satisfy your requirements. — _____. At least you tried.