Susan was just _____ at those pigeons at the time, so I don’t think she saw me.
It is a fact that _________ differences between countries may cause misunderstandings in communication.
North Europe __________ Norway, Sweden, Denmark, Finland and Iceland.
I was greatly impressed __________ the speech by the mayor of Shanghai before the final voting for EXPO 2010.
When I entered the step-classroom (阶梯教室), the lecture __________ and the audience __________ attentively.
After they had finished recording Let It Be, the Beatles __________. .