.----Who are those people gathering in front of the building? -----A group __________ itself the youth volunteers.
She’s in a hopeless situation, _____ we will keep a very close eye on.
Now many people move into cities in order to have their children _______.
They were thirsty, so they went ______ something to drink.
I ______ Beijing for Shanghai in a few days. Do you know when the earliest plane ________?
A lot of questions _________ at the meeting, which made things more complicated(复杂的).