以下所列各项活动中,属于实践活动的是①学生听课 ②教师给学生讲课 ③经济政治体制改革 ④中美进行钢铁贸易谈判 ⑤第五次人口普查 ⑥蜘蛛织网,蜜蜂采蜜
---- How is the old man now? ---- Sorry, he ______ though they did all they could to save him.
---- Do you live in this city? ---- No, we ______ it for holidays.
Nothing _______ clear about the meeting.
I’d rather you did some housework when you are free, but you __________.
---- Where _______ the guidebook? I can’t see it anywhere. ---- I _______ it right here, but now it’s gone.