I have a set of ___(钥匙).Jim and Tony ___(是) good friends.

问题描述:

I have a set of ___(钥匙).Jim and Tony ___(是) good friends.

key作钥匙这个意思时是可数的,故第一个空是keys;主语有多个名词构成时,谓语动词得是复数形式,故用are。
希望采纳,谢谢!

key是不可数 are

keys are