Something terrible       have happened if Li Chang was not coming to eat in his restaurant as he always did.

—Where _____ Mary have put the empty bottles? — She _____ them away. They must be somewhere. 

Look! The light in the room is still on. Mr. Liu          at work.

―Must I report the situation of the new company to the manager now? ―No, you         . You are tired and you can do it after you have a good rest.

According to the school rules, if a student _________ happen to damage something by accident,he/she should report it to a teacher or the office immediately.