The pot was used for keeping hot water.这个句子里的前半句话为什么要用was过去时?

The pot was used for keeping hot water为什么用was The pot _ for _hot water .A used; keeping B was used; keeping C is used; to keep Dused; keep The pot is used for __(keep)water hot The pot was used for keeping hot water.这个句子里的前半句话为什么要用was过去时? 求英语提解答( )50 The pot ___ for ___ hot water.A.used; keeping B.was used; keeping C.is used; to keep D.are used; keep( )51 Tea ___ in the south of China.A.grows B.is grown C.were grown D.will grow( )55 The bridges___ two years ago.WO It's a H The pot ______for____hot water A.used;keeping B.was used;keepingC.is used;to keepD.are used;keep答案是选择C,可是我实在是想不通...为什么啊, In the past this king of machine__cutting paper.A.uses for B.used for C.is used for D.was used for the computer began only as a machine that was used for calculating句型转换 the computer began only asa machine that was used for calculating的转换 在茶文化中有句英语「tea for pot」怎么解释?也有说「One for the pot」 英语翻译A 200-lb.burst (32 ECT) RSC was used for the outer container. 麻烦回答一下这个问题：What was the canal of china used for at that time. 翻译：He was also confused by the black stones people used to burn for fuel. 英语翻译Was the private land that was studied of comparable quality to the common land before either was used for grazing?特别是“...before either was used for grazing”这部分应该如何翻译? (用法比较）Dr Ma_________in a hospital,but now he works for ORBIS on the plane.A:used to walk B:used to working C:was used to working.D:was used to work He asked me _______ A.what the paper is used B.what the paper was used for C.what was the paper made of D.what's the paper used as五分钟以内加分 THE MELTING POT怎么样 英语翻译Remember that simple present was used for habits,facts and rountines.This is used for action now.Here is example of the difference. The professor was quite used to students' being late for the lecture.中students' 后面为什么还要加个being,