1.词性不分
Do you know how many countries belong to ________（欧洲）Union.
The government will take _________（立刻）action to punish the criminals.
Since my ___________（到达）in France,I have made a great number of friends.
2.忽略名词的复数形式及不规则变化
One of the ______________（乘客）taking the plane to London is a great writer.
