【单选题】【消耗次数：1】
IPV6地址是由（ ）位二进制比特组成的
①
32
②
48
③
64
④
128
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①
don’t they
②
didn’t they
③
did they
④
do they
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①
can
②
may
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might
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should have sent
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was going to send
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①
dares catches
②
dare to catch
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dare catching
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dare catch
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①
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①
must; can; must; his
②
may; can; must; him
③
must; can; him
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①
were
②
should
③
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【单选题】
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①
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②
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③
didn’t; had
④
don’t; have