If the test strips were kept sealed they "probably" are good. The sure way to test this is to take a blood sample with a strip that has not expired, and then shortly afterwards, use a strip from the "expired" container. If readings are comparable, it suggests the "expired" strips are good to use.
Read the post by Molly on the American Diabetes Association diabetes forum. http://community.diabetes.org/t5/Adults-Living-with-Type-2/Are-Expired-Test-Strips-Really-Expired/td-p/59237