<em>Because/ Since/ As</em> Neel enjoys growing fruits and vegetables, he volunteers at the community garden.
Shonda is not allowed to get her ears pierced <em>until</em> she turns thirteen.
<em>Unless</em> you return my sweater, I will not lend you any more clothes.
Use of ground troops: Americanization used US ground troops to fight the war whereas Vietnamization used S.Vietnamese ground troops to fight the war.
Johnson moved the US from an aid and financial backer to a ground force with men in active duty on the front lines in addition to naval and air support. Nixon's policy removed the ground troops, leaving the S. Vietnamese to fight that on their own (with our aid and money) but continued our air strikes and naval support.
The Classical Era set the scene. It brought us the major civilizations, religions, and trade routes. But, what happens when all of the major world powers collapse? This is the Post-Classical era. The major world powers come from places you might not expect. There are some powers that are similar to the ones before and the ones after (Byzantine, China). But, the major players in the Post-Classical era come from totally backwards places. One sprouts out of a cave in the Arabian desert. The other comes from the base of a mountain on the steppes in Central Asia. I call this era, Muslims & Mongols. That's not everything, but it just about sums up the basics. (Of course, Trade, Migrations, Religion, and Labor are important...) The Post Classical Era is the FIRST era that represents 20% of the test. From here on out, these eras are worth more than the first two.
If you are retired, you do not have a source of income from a job--you rely on your savings, interest from investments, or the government (e.g., social security in the US). With a job, your salary typically increases every so often to track inflation. When you just have savings, the total value of your money stays the same while the purchasing power of that money decreases. Investment income on your savings (e.g., interest) counterbalances this effect somewhat and government programs typically give out more money to account for the effects of inflation, but neither of these counterbalancing measures may prove sufficient.