at the top of one's voice大声 by the way顺便说一下

in the darkness在黑暗中 in the form of以……形式

on/over the radio通过收音机 under the leadership of在……领导下

with the help of在……帮助下 break the law犯法

form the habit of doing sth.养成……习惯join the army/league参军、入团

keep the balance of nature保持生态平衡listen to the radio听收音机

make the bed收拾床铺 make the best use of充分利用

put sb. to the trouble of doing sth.麻烦某人干某事

take the side of支持 tell the truth...说实话

What's the difference between...?之间有什么区别……

What's the matter with...?怎么了

What's the population/height/length/weight of...?人口、高度、长度、重量多少?

巧记：使用定冠词口诀

沙漠、河流与群山，列岛、海峡与海湾，阶级、党派、国家名，组织团体和机关，方位、朝代、独一词，

会议、文件及报刊，木器、建筑、海洋群，定冠词来不能删。