July and August are good vacation months, but the latter is more popular. June, July, and August are good vacation months, but the last is more popular. Sven E Carlsson offers tremendous references for people interested in film sound history. A great way to check your grammar knowledge. Use the archives or sign up twice a year for daily e-mail lessons.
Quizzes take four minutes, and are easy and fun.
An outstanding site to use as a quick reference for your grammar questions. Also describes the forensic examinations performed by the FBI Laboratory. An attempt to provide accurate, referenced information on technological innovation and related subjects in western Europe during the Middle Ages. The stone test wall was constructed to study the performance of stone subjected to weathering. Sponsored by the National Park Service through The National Center for Preservation Technology and Training.