共50条信息
汤姆,别把皮肤暴露在阳光下。
Tom, don’t __________ your skin __________ the sun.
目标之一是保证每个人都能喝到干净的水,因为在很多地方得把水煮沸后才能放心饮用。
One of the goals is to ________that clean water is ________ _______everyone, ____in many places water is not safe to drink_________ it is boiled.
so that _________________
我在交朋友方面有困难。
_______________________________________________________________________________
cycle
做化学实验时,你必须得小心别伤到自己。
进入组卷