keep the water boiling为什么这里boiling要加ing

let is keep the water keep frogs in the water Lets Keep the Water clean 中文意思 We need to keep the water clean.(改为一般疑问句) _______we_______to keep the water clean? keep the water boiling为什么这里boiling要加ing we should keep the water clean(改为一般疑问句） We should keep the water clean 的汉语意思是? you should keep the water clean at ______(little). They can keep the water from fiowing away. It can keep the water supply unpolluted 怎么翻译 The pot is used for __(keep)water hot you must keep the fish in water.卷子上的, keep water very The force of air will keep the water in the jar改为一般疑问句 The _(leaf)on the ground keep the water running away 中文翻译 The ______(leaf) on the ground keep the water running away The dead leaves on the ground also keep the water from running away. The little girls stayed in the water ____(keep) themselves cool