She __________ have left school, for her bike is still here.
One evening when it was so warm, I stayed awake _________ until half past eleven in order to have a good look at the moon by myself.
The mother didn't know who ________ for the broken glass as it happened.
The whole nation watched the two candidates________the issue of raising taxes on TV.
—The fellow has been suspected________an email fraud.—Nowadays cybercrime is developing________an amazing rate.
Imperfect goods are________by our quality control center in case they come into the consuming of the customers.