"why couldn't they meet us at five o'clock?" "Because they were delayed by ___"A.a heavy traffic B.heavy traffic C.some heavy traffic D.traffic being heavy答案是B 不知道为什么

why not,why didn't,why couldn't的区别 I couldn't underst and why they were all laughing at me.为什么laugh要加ing why couldn't linda see davy为什么不说成“Why linda couldn't see davy I'm sorry,I ____understand.Can you speak more slowly?要填couldn't还是don't?Why? They couldn't agree with each other they couldn't have done better是什么意思 高三英语语法题Why couldn't they catch the early train?They were delayed by______答案是heavy traffic为什么不是a heavy traffic Why couldn't they meet us at five o'clock? Because they were delayed by heavy traffic帮忙 翻译一下 求解释 why couldn't they catch the 6:30train?Because they were delayed by()some heavy traffics,any heavy traffic,a heavy traffic,heavy traffic选哪个? They all looked so damn happy to me.They all looked so damn happy to me.why couldn't l look like that? ---Why didn't you stop them from going into the forest?---I did try.But they _____listen to me.A.couldn't B.wouldn't C.needn't D.shouldn't但why? They couldn't help ______when they heard the news. 改错They couldn't find such books that they needed. Susan has to work very hard .I( )do her job,I'm sure.A.can't B.couldn't这里用哪个词?why? they couldn‘t see anything unusual改成同义句 I'm ashamed that I couldn't work out the problem,___ my classmate Tom could.A and Bwhile C sinceD why Did you go to the cinema last night?Unluckily,I couldn't( )it.But I'm going to tonight.A.make B.do why? why couldn't they meet us at five o'clock? Because they were delayed by ___A.a heavy traffic B.heavy traffic C.some heavy traffic D.traffic being heavy答案是B 不知道为什么