1 A it is the first,second,third,etc.time (that)sb. have done sth.为一固定结构,that 从句需用现在完成时.
2 A until 引导的从句中用一般现在时表将来.
Is this the first time you ____Beijing?
Is this the first time you ____Beijing?
A.have visited B.would visit C.visited D.have been visiting
No one can be sure if the car on display fits him or her until he or she ___them
A.tries B.will try C.tried D.have tried
敢问选什么
A.have visited B.would visit C.visited D.have been visiting
No one can be sure if the car on display fits him or her until he or she ___them
A.tries B.will try C.tried D.have tried
敢问选什么
英语人气：272 ℃时间：2020-05-14 13:08:57
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