O grade
n. 普通等级考试（苏格兰旧时的单科考试，低于高级考试，通常在 16 岁时参加。1988 年由标准等级考试取代）
🧩 词语组成解析
🗣️ 情景例句
About the quality of 500 cartons of tin food we ordered last time.
是关于我们上次定购的500箱罐头食品的质量问题。
To speed-read
速读
As the neighbours complained of the noise, my husband spent weeks training him to press his paw on the latch to let himself in.
由于邻居们对狗叫很有意见，所以我丈夫花了几个星期的时间训练它用脚爪按住门闩把自己放进来。