题目内容：

With the wide, application of the Internet, Uber, a new approach to your destination instead of taking an ordinary taxi, has become more popular recently. However, benefits won’t come without its fair share of drawbacks. The ride-sharing experience is about to get awkward.

Uber drivers are a part of the so-called sharing economy: They use their own vehicles, receive customer reviews via the app’s five-star rating system and make their own hours and choices. Unlike other services, Uber claimed that drivers all over the country could dearly alert customers that tipping is not included. Those drivers that expect to be tipped can make their wishes known. But the company is holding to its official no-tip-required line. “Once you arrive at your destination, your fare is automatically charged to your credit card on file－there’s no need to tip.” Although drivers value the freedom to push a button rather than punch a clock like ordinary taxi drivers, lack of a clear policy leaves Uber drivers m a vulnerable (脆弱的) and awkward position: If they ask a customer for a tip or put up a sign, that customer could give the driver a low star-rating, and the driver could finally be removed from the app.

But has the company done a good job working with customers? Some observers say that this new grey area for tipping will create awkwardness about whether they should tip or not. Providing an option to tip on an app sends a  clear message to customers to reach into their pockets. According to Guinn’s 2015 survey of roughly 500 people, merely 30% people would be more likely to leave a tip if they were presented with a “no tip” button.

If the service is twice as expensive during a rain storm or public transport delay, the customer has the right not to tip, However, if the driver is extra helpful or avoids traffic to reach your destination in a more timely manner, you could give an extra tip, says Uber, who will leave tipping options in the hands of the consumer rather than the app.

1.According to the passage compared with taxi drivers, Uber drivers        .

A. earn more money and respect    B. enjoy more freedom and chokes

C. record the miles while driving    D. give direct reviews to customers

2.What causes the awkwardness between Uber drivers and their customers?

A. Uber’s no-tip-required line is too strict to follow.

B. It’s up to customers to decide the drivers’ earnings.

C. There’s no specific and clear policy on tipping from Uber.

D. Uber drivers and customers can’t agree on how much to tip.

3.From the survey in Paragraph 3, we can conclude most customers           .

A. are not clear about how to tip via the app

B. tend to do as the “no tip” sign suggests-

C. tip because of Uber drivers’ good service

D. are awkward when provided with service

4.Which of the following would be the best title for the passage?

A. What Uber Cars Bring to Modem Life

B. How Uber Cars Benefit Uber Customers

C. Take or Not When Facing a Uber Car?

D. Tip or Not When Taking a Uber Car?