前面我们已经专项练习了 ɛ 和 æ 两个发音，下面我们来进行集中训练！
I haven't decided yet.
That story has a very sad ending.
I have never traveled to America.
Did you catch him red-handed?
red handed 意为“正在作案的”，catch sb. red handed 意为“当场抓住某人”。
Let's meet at half past ten tomorrow morning.
He let the cat out of the bag.
let the cat out of the bag 等于 reveal a secret, usu. by mistake，意为“（无意间）泄露机密”。
It's not the end of the world if you fail that test.
In the summer, people dress in casual clothes, like T-shirts and shorts
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