Misc: What is the only continent without reptiles or snakes?

Questions

On This Day In January 1954 - The Duoscopic TV receiver was unveiled this day. The ______ set allowed the watching of two different shows at the same time.?

On This Day In January 1959 - The United States recognized ______ Castro's new government in Cuba.?

On This Day In January 1968 - The cost of a U.S. first class ______ was raised to 6 cents.?

On This Day In January 1975 - ______ agreed to raise crude oil prices by 10%, which began a time of world economic inflation.?

On This Day In January 1979 - ______ forces captured the Cambodian capital of Phnom Penh, overthrowing the Khmer Rouge government.?