Wow, what a large crowd!—Yes, And they______ in the cold wind for hoursYou know, Premiere Wen Jiabao is coming here

What were you doing when she dropped in—I for a while and_________ some reading.

me students, professional training might be the way to go since well-developed skills, _______ , can be the difference between having a job and not.

I think this problem is _______ that one.

It’s raining heavily outside.- _______, I will go back home because my son has beenleft alone at home.