The Math problem is too difficult , we really don’t know ________ to do it .
---A number of people_____killed by the terrorists at the Urumqi station.----_____terrible it is!
As we know, England is ____European country and Singapore is ___Asian country.
--Could you please help me?We need another twenty chairs.----Sure.I’ll do it right now.
--You won’t lose weight unless you take exercise every day .----OK,I’ll try my best.
--Would you like to go fishing with us this afternoon,Tony?---If Sam doesn’t go, I won’t go ,either.