It was my sister ________ first had the idea to cycle along the entire Mekong River

下列各组词语中没有错别字的一组是（ ）

It is said that we will have _____ one-day holiday tomorrow, it’s ______ good news for most of the students.

t understand what the engineer means, but I’vegot ______ rough idea of _____ project plan

My mother often tells me _______ my classmates when they need.