题目内容
Personal computers_______ in 1976. It has changed the whole world .
A. have been invented B. are invented
C. were invented C. invented
试题答案
1、C
[ ]
B. are invented
C. were invented
D. invented
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 |
Personal computers in 1976．It has changed the whole world．
A． are invented B． invented
C． were invented D． have been 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．was invented
C．were invented
D．are invented