I think you should complain, _____, of course, you are happy with the way things are

We should _______ humans from ________ down too many trees. —I agree with you. Trees are very important to us.

gh she had been ill for a long time, it still came as a shock when she ______ died.

一___________do your parents take exercise, William—Less than three times a week.

下列各句中加点成语的使用，全部正确的一项是（ ）①庄子和陶渊明就是这么一类人物，他们独与天地精神之往来的简朴纯正，让多少渺小的人难以望其项背。②近日，我省多地区遭受暴雨袭击，天气阴晴不定，本是晴空万里，刹时间电光石火，雷雨交加，使人猝不及防。③本届展销会邀请到了安徽、浙江、上海等地知名企业，湖笔、宣笔、徽墨、宣纸、歙砚等文房四宝济济一堂。④我国渐渐进入老年化时代，很多家庭有足够的条件为家中生病的父母出国求医，但医疗中介机构难免泥沙俱下，广大老年病患一定要识别其中的陷阱⑤在旅游景区，我们司空见惯了游人随地乱丢垃圾，随处刻字题词，随意给野生动物喂食等不文明的行为。⑥中国海军在南海举行的军演，展示出新时期中国军人保家卫国的勇气和决心，即使马革裹尸，也要捍卫主权。