重点讲解：
1. check out
了解清楚；核实；查实；
eg. Tomorrow , at the bank, I'll try to check out my mom's security system.
我明天会去看看银行的安全系统。
eg. Check out this link for information on local leagues.
查看这个链接来查找当地的组织信息。
2. excuse sb. for sth.
原谅；宽恕某人某事；
eg. Many people might have excused them for shirking some of their responsibilities.
很多人可能已经原谅了他们逃避责任的行为。
eg. Nothing can possibly excuse him for such rude behavior.
他这样粗鲁的行为，无论怎样都不能原谅。
3. fall out
掉落，脱落；
eg. In his sleep he let the book fall out of his hand.
他睡着时书从手中掉了下来。
eg. My tooth fell out.
我的一颗牙掉了。
4. all over
到处； 遍及；
eg. There are papers strewn all over the floor.
地板上到处撒满了纸。
eg. I itch all over.
我浑身痒。
5. forget to do
忘记；忘了（做）某事；
eg. Don't forget to give me a ring.
别忘了给我打电话。
eg. Drivers who forget to light up at night often cause accidents.
晚上忘记开车灯的司机常常出车祸。