31~35
 * The article was published on February 6th, 2020.
         Scientists are still learning about the coronavirus outbreak that   31   nearly 500 people so far and infected more than 24,000 in China. But many people are wondering   32   .The outbreak   33    on December 31, until now, the number of children patients is much lower than adults and older people. A low case count among kids is a good thing because children are   34   likely to wash their hands, cover their mouths, and often touch others — behaviours that would make them get the virus more easily. There are two possible explanations for the few cases of children patients.   35     they have less chance to go to a place which is full of virus   35     there's something different about how their bodies respond to the virus. Although scientists still don’t know which is the main reason. It’s a good news that children can stay healthy in this disaster.
【題組】31.
(A) is killing
(B) is going to kill
(C) has killed
(D) had killed