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4.The number of people who_____ killed in the Air France crash(坠毁)_______ 228.
A.was; was
B.were; was
C.were; were
D.was; were
The number of ...表示"...的数量",谓语（第二个空）用单数,排除CD
who ...killed in the Air France crash 这是一个定语从句修饰复数名词people,所以从句谓语用复数,排除AD
答案：B
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-------------------------------那为什么第一个空不用waswho ..定语从句 修饰的是people, who即指代复数名词people，所以其后谓语用复数