He might have_____ his idea about the artat the exhibition much better if he had planned what he wanted to say

Hearing their grandpa was coming, they began to ________ the work to prepare for a nice dinner.

下列各句中，表达得体的一句是（ ）

The teacher together with the students________discussing Reading Skills that________newly published in America. [ ]

Students in the USA spend time their homework than we do.