I’m stuck is used __________. A. when you have a good idea B. when you go on talking without stop B. when you are thinking something is too easy D. when you can’t continue with something because it’s too difficult
Shanghai is trying to control ________ number of cars on the road to ensure clean air for ________ 2010 World Expo.
__________ that the group of experts like them immediately.
What way are you thinking of ______rid of the air pollution in our capital city?
They were kept waiting in the snow for a couple of hours,________.
The front door ________ open.I'll have it repaired.