Tom, clean up the broken glass _________ someone walks on it.
If it ____for the snow, we____ the mountain yesterday.
Surely many questions will ____ about Haiti’s future after the big earthquake, which has been the strongest in Haiti in the past 200 years.
“It is not only you but also Tom who ____,” said the teacher after knowing what had happened.
After school we went to the reading-room to do some reading, only to be told that it _____.
Jack is a great talker. It’s high time that he ____something instead of just talking.