Among the most important questions the journalists wanted _____was how Greece could overcome economic crisis ?
I think _______ impresses me about his painting is the colours he uses.
The two countries are going to meet to _______ some barriers to trade between them.
English is a language shared by several diverse cultures, _________ uses it differently.
We won’t start the work until all the preparations __________.
---How long have you been learning English? ----_________! Your English is so good.