A NASA experimental jet, the X-43A, flew at a world-record speed---11,260 kilometres an hour on November 17. This speed is as that of sound.A. as ten times fast B. ten times so fastC. ten times as fas 题目和参考答案——青夏教育精英家教网—

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A NASA experimental jet, the X-43A, flew at a world-record speed---11,260 kilometres an hour on November 17. This speed is ____ as that of sound.

A. as ten times fast B. ten times so fast

C. ten times as fast D. ten times faster

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Compared to other parts of the body, our ears don’t ask for much. They don’t need to be brushed once a day like your teeth. But they meed some special care, especially if you like listening to music with earphones.

Maybe your mum or dad has told you,“Turn that down before you go deaf!” Well, they are quite right. Loud noise might cause hearing loss for a short time or even forever. Think that earphones are a good way to escape from tour parents’ eyes? Well. It may not be as good a way as you expect. American doctors have studied a group of 44,000 people who used earphones more than 15 hours per week. The doctors found that 37,000 of them were getting hearing problems.

If you use earphones for to8 long a time, your ears might feel painful. You could also lose your hearing for the rest of your life. So don’t wear your earphones too long. Use them less than one hour a day. Want sharp hearing? Don’t forget to do the following: Try to stay away from places where there is too much noise, like a disco. If you have to go, wear earplugs. When swimming, remember to put earplugs into your ears to stop water from getting in. Never put anything sharp into your ears. If you think you have too much earwax, ask your mum or dad to help you clean it out.

Keep these things in mind! Then you won’t be saying “WHAT???” when you are older.

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C. it makes your parents angry

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Tips on Tipping

Cabin steward

$3.00 to $3.50 per person per day

Waiter

$3.00 to $3.50 per person per day

Assistant waiter

$1.50 to $2.00 per person per day

Bartender, wine and deck stewards

10-15% of the bill

Maitre d’

$5.00 to $10.00 tip for each special service

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B. In the line Seabourn, you must tip crew members for the special service.

C. In some lines, you can bargain on how much to tip.

D. Generally speaking, maitre d’ can get the most tips.

70. The passage is written mainly for the readers who are ______.

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B. students to foreign countries to study

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D. travelers on cruise the first time

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