1. You are quarantined because you have been infected with H1N1. During this period of time, you will stay at the hospital.2. Son, I will go abroad tomorrow for a month. During this time, behave yourself.3. In the course of the battle between Nation A and Nation B, the king of Nation B was captured and killed.4. Which Christian group did not participate in the battle during World War I?5. Which Christian group did not participate in the battle in the duration of World War I?6. In Taiwan, the President is elected for a term of four years.
 period time course duration term這些字都有「期間」的意思，period 算是最普遍的字。
When a man and a woman start dating, they need to go through an adjustent period before they decide to marry each other.