中国共产党中央委员会于 2017 年 10 月在北京召开第十九届全国代表大会，它开启了一个新时代．
The national conference of CCPCC was held in Beijing in October， 2017， which
a new era．
我们计划去北京，但还没决定何时去。
We are planning to go to Beijing, but we haven’t decided __________ __________ __________.
为了进一步美化校园，下个月会在学校种很多树。
Next month many trees __________ __________ __________ in our school to make it more beautiful.
你们自己算出了这道数学题。多么聪明的孩子啊！
You’ve worked out the maths problem yourselves. __________ __________ children you are!
呆在家里，直到你妈妈回来。
Stay in your house __________ your mother __________ __________.
长大后我想成为一名英语教师。
I want to be an English teacher when I __________ __________.