Voices were _____ as the argument between the two motorists became more bad-tempered.
No one _______ the building without the permission of the policeman.
The new bridge is ________ the one built last year.
She ________ down her book and ________ in bed.
Some researchers believe that there is no doubt _______ a cure for AIDS will be found.
To write his paper, he tried hard to collect _______ information as he could.