学连音 说地道口语：of → a (音频)
of → a
of 在自然语速下就发作 a 的音，但还是要提醒一句：如果 of 需要强调突出，那么它仍然念做 of 。
Listen to each part of the conversation: first spoken with careful (slow) pronunciation; then spoken with relaxed (fast) pronunciation.
JULIE: The party's tonight. I've invited a lot of people.
SHOKO: Then, let’s go shopping. It’s already a quarter of three.
JULIE: You’re right. It’s late. Let’s make a list.
SHOKO: Okay. We need a case of soda.
JULIE: Right. We also need a bag of pretzels.
SHOKO: What about a few bags of chips?
JULIE: Okay. And a couple of packages of cheese for the dip.
SHOKO: Great. Your cheese dips are always so good.
JULIE: Thanks. We need a couple of other things, too.
SHOKO: Wait. I don’t have my credit card. Do you have yours?
Listen to the entire conversation again, spoken with relaxed (fast) pronunciation.
注：对话中提到了一个cheese dip，就是“奶酪酱”，dip做名词时有“调味汁”的意思。
