If you've ever had to chop an onion，you probably know that it's one of the most annoying cooking experiences．It just fills your eyes with tears．Scientists and farmers have been working on a solution to this problem for decades，and they've apparently come up with a tearless onion．
Called the"Sunion"，this new vegetable is the result of a natural cross-breeding program that's been going on farms in Nevada and Washington since the 1980s．It's supposedly a sweet，mild-tasting onion that doesn't leave that strong，pungent aftertaste，but what really sets it apart from most other onion varieties is that it doesn't cause teary eyes when it's chopped．
When you cut into a normal onion，it releases a compound called lachrymatory-factor synthase，and'when that hits your eyes，your body produces tears．Now，the interesting thing about regular onions is that the amounts of lachrymatory-factor synthase increase the longer the vegetables are stored，so the older they，the more you cry．In Sunions，on the other hand，the levels of that annoying compound drop the more time goes by，until it no longer has any effect on your eyes when you cut it．
That's what Sunion growers are claiming anyway，but reports from those lucky enough to have tried them seem to confirm these claims．The Huffington Post had three of its reporters chop some Sunions，and apparently，none of them shed a single tear．According to the Washington Post，they don't have the
pungency of regular onions and are so sweet that you can eat them"like popcorn"．
So the good news is that tearless onions are now a real thing．The bad news is that they are currently only grown in Washington and Nevada，and even though they are sold nationwide，they are still in relatively short supply．The first Sunion batches hit the shelves of grocery stores in December，but we'll probably start seeing them in most grocery shops and supermarkets in the next few years，as more people learn about them．
（1）What is special about the Sunion？
C
C
A．It's easily chopped．
B．It's sweet and tastes strong．
C．It's tearless and mild．
D．It's grown nationwide in the USA．
（2）How does the author introduce the Sunion in Paragraph 3 ？
A
A
A．By comparison．
B．By telling a story．
C．By giving examples．
D．By asking questions．
（3）What does the underlined word"pungency"in Paragraph 4 mean？
B
B
A．Round shape．
B．Strong smell．
C．Special character．
D．Medical function．
（4）What can we conclude from the last paragraph？
D
D
A．The Sunion has been largely on the market．
B．The Sunion is still on trial at present．
C．The Sunion will soon be grown worldwide．
D．The author is confident about the future of the Sunion．
