he will__hold his dog in his band because it is

He will__hold his dog in his band because it is too fierce.
a.has to
b have to (不能确定)
.
而band 应该是 hand.
但是要填:
have to 因为 will 之後,动词是原形.
He will have to hold his dog in his hand because it is too fierce.
他一定要用手把他的狗控制著,因为它太凶恶了.
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A

什么意思？选项呢