If we _____ the tickets half a year ago, we would not be able to visit it on May Day now

Have you read this book— Yes. But that one is ________ worthreading.

ummer we saw a very good film, ____ was about the Anti-Japanese war.

important to pay your electricity bill on time, as late payments may affect your _________.

Class regulations state _____ is the last to leave theclassroom _____ off all the lights