重点讲解：
1. as though
好像；仿佛；
eg. Her nostrils were pinkish, as though she had a cold.
她的鼻孔略带粉红，好像患了感冒似的。
eg. Jack tore into the steak as though he hadn't eaten for a week.
杰克大口吃起牛排来，好像一个星期没有吃东西似的。
2. hear from
接到…的信（或电话）；
eg. The police are anxious to hear from anyone who may know her.
警方急切地希望任何可能认识她的人打电话来。
eg. We are always pleased to hear from our customers.
我们不论何时都欢迎顾客来信。
3. of course
（表示通常、显见或众所周知的事实）当然，自然；
eg. Mothers as a matter of course have much affection for their children.
母亲自然很疼爱孩子。
eg. Of course, the British will suffer such daily stresses patiently.
当然，英国人将会耐心地承受这些日常压力。