pair 可跟单数或复数动词.
规则如下：
如果所指名词属于通常以一套来用之类,比如 手套,眼镜,用单数动词,
否则用复数动词,
例句：
His pair of gloves is for you
Please be careful where you step,a pair of glasses has been lost
John and Mary often can't get along with each other,but lately the pair are working more harmoniously now.
也希望点击“选为满意答案”及时采纳,