1.
(2020·甘肃模拟)
—I'm going to give a talk on Beijing 2022 Winter Olympic Games to my classmates.
—Great! But don't forget to tell them ___________.
A . when will it take place
B . Beijing is the first city to hold both Summer Olympics and Winter Olympic
C . whether Zhangjiakou City will join in Beijing
D . when the good news was announced on July 31st, 2015