摘要： Personal computers in 1976. It has changed the whole world. A. have been invented B. are invented C. were invented D. invented
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Personal computers _______ in 1976. It has changed the whole world.
[ ]
A. have been invented
B. are invented
C. were invented
D. invented
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B. are invented
C. were invented
D. invented
Personal computers _____ in 1976. It has changed the whole world.
[ ]
A. have been invented
B. are invented
C. were invented
D. invented
查看习题详情和答案>>
B. are invented
C. were invented
D. invented
Personal computers_______ in 1976. It has changed the whole world .
A. have been invented B. are invented
C. were invented C. invented
查看习题详情和答案>>Personal computers ____ in 1976.It has changed the whole world.
A.have been invented B.are invented
C.were invented D.invented
查看习题详情和答案>>Personal computers ________ in 1976. It has changed the whole world.
[ ]
|
A ．have been invented |
B ．are invented |
|
C ．were invented |
D ．invented |