--This kind of sports is exciting．
--Yes，but it's dangerous．One can't do it ____ he or she has got some training．
A．if B．after C．when D．Unless
--Could you tell me ____?
--Until tomorrow afternoon．
A．how long you will stay there
B．how soon you will stay there
C．when will you stay there
D．how often will you stay there
--How can we help the children in the mountain village?
--We can ____ leaflets to ask people to donate money．
A．give in B．give off
C．give up D．give out
Chairperson Xi calls on us to do what we can ____ as much as possible．
A．save B．to save C．saved D．saving
--Mr. White asked me to remind you of the meeting this afternoon．Don't forget it!
--OK，I ____．
A．won't B．don't C．will D．do
After a short time，the bad news had____ all over the city and everybody knew it．
A．showed B．spread C．covered D．explored
