题目内容：

    Feb. 29, or Leap Day, arrives on your calendar once every four years—and 2020 is one of them. The reason there are 366 days every four years instead of the standard 365 is that the calendar doesn't precisely line up since the Earth orbits the sun in approximately 365 days and 6 hours. Hence, every 4 years a leap day, February 29th, has to be added to correct for the difference.

It's not a federally recognized holiday, but Leap Day is a special occasion, so retailers typically offer many sales, deals and discounts. From food to travel deals, here are 29 Leap Day 2020 discounts.

●Hard Rock Café: Customers with a Leap Day birthday receive a free entrée from the restaurant's Leaplings Eat Free menu with a valid photo ID.

●Dog Hans: Enjoy a free upgrade from a single to a double burger on Feb. 29, which will save you $2.49.

●Legal Sea Foods: Get two 1-pound lobsters and two sides at any of the East Coast eatery's 30 non-airport locations for $29(over a $50 value) on Feb. 29.

●Big Frog Custom T-Shirts ＆More: Get a free Leap Year 2020 T-shirt at any of the retailers participating locations on Feb. 29—no purchase required.

●Foot Locker: Save 15 percent on purchases of $70 or more through Feb. 29.

●Expedia: Save up to 29 percent off select hotels worldwide with reservations made on the Expedia mobile app on or before Feb. 29. Some restrictions apply.

●Avis: Take $25 off the cost of a weekly car rental with code MUWA169 through March 30.

●Marriott: Enjoy up to 20 percent in savings when you use code ADP to book a room in advance through March 19.

1.Why is there an extra day in February 2020?

A.To remain in line with the true astronomical year.

B.To officially celebrate a special occasion.

C.To pass down a time-honored tradition.

D.To offer a business promotional opportunity.

2.How much will you pay for a pair of shoes priced at $100 on Feb. 29?

A.$15. B.$85.

C.$75. D.$70.

3.Which of the following offers discounts beyond Feb. 29?

A.Dog Hans. B.Legal Sea Foods.

C.Expedia. D.Marriott.