Eyewitness provides an evidence that he was ___ of the crime.
I just don't understand_______ that prevents so many Americans from being as happy as one might expect.
The fire started in the basement and quickly____________ to the first floor where it destroyed all the______________ in the language lab.
Mary ___________to see you.She._________ for you downstairs at the moment.
The bad weather meant__________ the rocket launch(发射)for 48 hours,.
She was afraid __________ the dog in case it became dangerous.