如图，平行四边形ABCD的面积是100平方厘米，三角形ABE的面积是31平方厘米。三角形BEF的面积为多少平方厘米

A．50

B．31

C．19

D．100

(36) have greeted Queen Elizabeth Ⅱ as she appeared outside (37) in a pink suit and hat on her 80th birthday. And (38) working grandmother shows no signs of slowing down and has genes on her side -- her mother died at 101. Queen Elizabeth’s husband, Prince Philip, followed close behind as she (39) the castle’s King Henry VIII gate, Voice of America reports. A military (40) played and a 21-gun salute (41) nearby ahead of another 41-gun salute in London’ s Hyde Park later in the day Friday. Prince Charles is (42) a birthday dinner for the (43) at a palace in London’s Kew Gardens. Queen Elizabeth has received 37,000 birthday cards and e-mails from around the world, according to (44) Queen Elizabeth Ⅱ issued a (45) saying she (46) by the messages. In an ITV News survey, Elizabeth was (47) the most popular royal. Bottom of the survey came Camilla Parker-Bowles, Duchess of Cornwall, who last year married the queen’s eldest son, Charles, after a tortuous 35-year (48) . In her 80s, Queen Elizabeth Ⅱ remains perhaps the most (49) . She is known for her penchant for brightly colored suits and hats. French designer Sonia Rykiel once criticized the Queen of England about the way she dresses. She called the Queen "the worst dressed person in the UK". "The Queen is one of the worst dresses people in the UK. She should stop wearing those bright suits and hats ..." Sonia Rykiel said. "A woman in her position should start dressing in a more (50) and serious manner." Frankly, we sold our Sonia Rykiel sweaters cardigans on eBay (51) after this interview. According to a senior royal aide, "The Queen proudly wears British designers. She wears (52) and stylish clothing which is right for the kind of work she does." Her main (53) include (54) photography, and dogs, especially her Pembroke Welsh Corgis. Queen Elizabeth II is Europe’s (55) living monarch. And lest we forget, Queen Elizabeth Ⅱ is the Queen of Canada, too.