These problems, ________, will seriously affect the growth of teenagers and even the nation’s future.
_____, I believe, and you will find Tom is very outgoing.
from the top of the tower ,the south foot of the mountain is a sea of trees.
—I wonder why Susan looks worried today. —I’m not sure, but she _____a small accident driving here.
The job requireddid itcareful and brave enough.
Is this the very material that scientists ______ the 2012 London Olympic Games torch?