“What is your good friend like?” “He is ____ .”

_______I toured Zhangjiajie, I was deeply impressedwith its beautiful scenery.

在下列句子的空缺处依次填入词语，最恰当的一组是（ ）①掐丝是一种非常 的工作。②这篇论文写得精准透彻，主要得力于作者 了大量资料。③人类对大自然的每一分破坏，都遭到了相应的报复，环境污染的威胁不亚于第三次世界大战，这绝不可 。

all the students are here. why don’t we start our class meeting right now

What did you buy yesterday, Lucy—I bought ________umbrella. ________umbrella is very nice.