Not for a moment ______ that this disease was caused by certain virus.
To our relief, the patient's condition is __________
I couldn't __________. The line was busy.
They are building the dam in __________ with another firm.
(2012·上海) The club, __________ 25 years ago, is holding a party for past and present members.
(2012·山东) After completing and signing it, please return the form to us in the envelope __________.