It's an English class. Please don't _________ Chinese.
A:say
B:talk
C:tell
D:speak
— Thank you. ______. I have to drive home.
These are my____(parents) photos.
下列高科技成就诞生的顺序( )
①“东方红1号”卫星顺利升空
②我国第一颗氢弹爆炸成功
③我国第一颗原子弹爆炸成功
④我国导弹核武器试验成功