They are "scratching their heads" because they are not fully convinced by Apple's decision to remove the headphone jack.

2. How long have  standard headphone jacks been around?

The 3.5mm jack has been used since the 1950s, and previous versions of this were first used in the late 1800s.

3. Why have some people mocked Apple's new headphones?

They think they look funny – some say they look like mini-hairdryers, others say they look like electric toothbrushes, and they've also been compared to the cartoon dog Snoopy.

4.Which word means 'hanging dangerously'?

Dangling.

5. True or false: Old headphones can still be used with an iPhone 7.

Yes, but only using an adapter.

2. 请你在不参考课文的情况下完成下列练习。选择一个意思合适的单词填入句子的空格处 。

1. Old headphones won't plug in to an iPhone 7.

2. Technology now means we can transmit information wirelessly.

3. The invention of the CD was a game-changer. Suddenly you could hear good quality music, cheaply.

4. You need to come up with something new. This isn’t good enough.

5. My new camera is water-resistant. It's fine to use it in the rain.

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