Roy:______It'sgettinglate.

Ellen:Mustyougosoon?

Some concepts may be difficult to grasp chiefly because they may be unfamiliar or _____ideas, opinions which we already hold.

We'dbettereliminatejunkfoodsfromourkitchenandkeepavarietyofhigh-qualityfoods_____atalltimes.

I still remember the days ____ we studied together.

Marywasthegirl____(在初中我和她一起看电影的)。