lucy ,together with some friends,___(be) going a camp in the china横线上应该填什么,是is还是are,

问题描述:

lucy ,together with some friends,___(be) going a camp in the china
横线上应该填什么,是is还是are,

是is

is

together with some friends,类似插入语,真正的主语是Lucy,单数,所以应该用is