A.had been working; are still working
B.had worked; were still working
C.have been working; have worked
D.have worked; are still working
A.didn't refer to
B.wasn't referring to
C.haven't referred to
D.hadn't referred to
开始考试点击查看答案A.is playing
B.was playing
C.has played
D.had played
开始考试点击查看答案A.has had
B.had
C.was having
D.had had
开始考试点击查看答案A.was playing
B.had been playing
C.have played
D.played
开始考试点击查看答案A.did
B.was doing
C.had done
D.have been doing
开始考试点击查看答案高中数学代数与函数一数系的扩充与复数的引入36
类别:数学(文科)高中数学代数与函数一数系的扩充与复数的引入28
类别:数学(文科)高中数学代数与函数一数系的扩充与复数的引入29
类别:数学(文科)高中数学代数与函数一数系的扩充与复数的引入30
类别:数学(文科)高中数学代数与函数一数系的扩充与复数的引入31
类别:数学(文科)高中数学代数与函数一数系的扩充与复数的引入32
类别:数学(文科)高中数学代数与函数一数系的扩充与复数的引入33
类别:数学(文科)高中数学代数与函数一数系的扩充与复数的引入34
类别:数学(文科)高中数学代数与函数一数系的扩充与复数的引入35
类别:数学(文科)高中数学代数与函数一数系的扩充与复数的引入26
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