The Clean-Up-Day is regarded as the ____ (big) project in our school.
有些青少年盲目地“随大流”或模仿别人,看到别人吸烟,自己也吸,看到别人崇拜明星,自己也去“追星”,这说明他们( )
____ ____ going shopping on Christmas Eve? That's a good idea.