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?

过去完成时有什么法则吗?最近考试了,15分的题,我只得了9.（ ）this week?No.She's away on hoilday.She ( )Spain.A.Does she work/has been toB.Has Susan worked/has been toC.Has Susan worked/is gone toD.Is Susan working/has gone to 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? Do you know ____?A.whether has Susan gone to AfricaB.when Susan has gone to AfricaC.if Susan has gone to AfricaD.where Susan has gone to Africa 【高一英语提问】2.( )Susan decided not to work on the program at home because she didn't want he parents to know what she____.A.has doneB.had doneC.was doingD.is doing mary and susan have 100 postcard in total.on susan's birthday,mary gives four over five of her postcard to susan.if susan has 85 postcards now.find the original number of postcards that mary has I've got to lot of work to do Susan came back home late ()work.A.for B.to C.from D.before susan insisted on ( ) to work in new york A being send B sending 关于英语的一些日常口语.1）A:Is Susan happy with her new boyfriend?B:I've never seen her happier.B说的意思是?我想知道具体的用法.2）A:We've got someone to take over Sally's job.B:Oh,so it has been taken care of.B的意思是? susan has been to school camp before.为什么填has been to?为什么填has been to?不填has gone to? I've got to work on mine 中文意思? it looks like we've got some work to do, 英译法：we've got work to do.咱有活要干. she has to work by ___(her) too,work,do,to,much,has,he Susan has been in this city for more than ten years改为同义句______ ______ more than ten years _____ Susan _____ to this city. Susan has been in this city for more than ten years同义句（）（）ten years () Susan () to this city 一道英语同意句转换,999999Susan has been in this city for more than ten years_____ _____ more than ten years _____ Susan moved to this city