求助以下英文語法怎麼填

The major cause of highway accidents in 2020 ___________ （be） drunk drivers。

Peter along with his 3 brothers ___________ （plan） to open a store。

Jack is one of those rare individuals who ___________ （have） decided on a definite career。

That the children want friends ___________ （do） not surprise me。

Either my sister or my brothers ___________ （be） going to do it。

最好能寫上為什麼用這個