—What____ four and five?—______nine.What____ four and five?______nine.A.are;They are B.is;It'sC.is;IstD.are;It's为什么,说明原因

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—What____ four and five?—______nine.What____ four and five?______nine.A.are;They are B.is;It'sC.is;IstD.are;It's为什么,说明原因
—What____ four and five?—______nine.
What____ four and five?
______nine.
A.are;They are
B.is;It's
C.is;Ist
D.are;It's
为什么,说明原因

—What____ four and five?—______nine.What____ four and five?______nine.A.are;They are B.is;It'sC.is;IstD.are;It's为什么,说明原因
B
第一个空指的是4+5的结果,而这个总和的结果是一个数字,所以用单数
第二个空 it's指的是“结果是”,指代的也是9这个结果,所以还是用单数

B

B

B

B