uld move quietly up to the sparrow on a smalltree just to get a better look, her face __________ with childlike expressionsat one of God’s simple wonders

White papers have played a more important role in introducing China to the world, with more white papers ______ by the government in 2011 than any other year[ ]

Afer class, I play ping-pong with my classmates.

I follow my own opinion, not hers in questions of this kind,of course makes her unhappy.

It’s really impolite to laugh_______ others.