关于pair?

a pair of shoes___zre__(be)
this/that pair of shoes__is___(be)
these/those pairs of shoes__are___(be)
another pair of shoes__is___(be)

a pair of shoes_____(be)
this/that pair of shoes_____(be)
these/those pairs of shoes_____(be)
another pair of shoes_____(be)
他们的谓语到底用is还是are啊？
这些词你主要是判断pair，如果pair后面加s的话，那么就用are，如果是a pair的话，就用is。
第一个是is， is， are， is

a pair of shoes_are
this/that pair of shoes_is
these/those pairs of shoes are
another pair of shoes is