In our class there are 60 students, ________ a quarter wear glasses.
Sorry, I am late. I _____ have turned off the alarm clock and gone back to sleep again.
Children under 12 years of age in that country _____ be under adult supervision when is a public library.
Oh, Tom, _____ you gave us!
Look! There _____ the bus!
In fact _____ is a hard job for the police to keep in order in a football march. 01