SLANG

We often use slang expressions when we talk because they are so vivid and colorful. ①However, they are usually out of place in formal writing because of a number of drawbacks. ②They go out of date quickly and become tiresome if used too much. ③And they may communicate clearly to some readers but not to others. ④In general, we should avoid the use of slang in our writing.

【难点点评】
（1） 句①中， drawback 意为“缺点”， 注意名词复数。
（2） 句②中， tiresome 意为“令人厌烦的”； 听音时需注意 used 为过去分词形式。
（3） 句③中， And 首字母要大写。
（4） 句④中， In general 与主句之间要用逗号隔开。