翻译:你应该改掉说谎的习惯。先生怒视着我说

翻译:你应该改掉说谎的习惯。先生怒视着我说
"you should__ _of the hadit of telling lies"said mr,_ _me
很显然，通过多年的实践，他逐渐掌握了这种研究方法.It is _that he gradually_ __ _ of this method of research after many year's practice
我们应该想办法防止有害气体的蔓延 we should find some ways to _the_gas_ _ _
你应该为你那天晚上的行为作出解释 you_ _ _ _what you did on that night