1.The boy ___ (ask) not to draw on the wall,wasn't he?1.Who ___(find) that lost girl?Her mother must be happy now.2.___ personal computers ___ (invent) in 1976?麻烦说明一下为什么?

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1.The boy ___ (ask) not to draw on the wall,wasn't he?1.Who ___(find) that lost girl?Her mother must be happy now.2.___ personal computers ___ (invent) in 1976?麻烦说明一下为什么?

1.The boy ___ (ask) not to draw on the wall,wasn't he?1.Who ___(find) that lost girl?Her mother must be happy now.2.___ personal computers ___ (invent) in 1976?麻烦说明一下为什么?
1.The boy ___ (ask) not to draw on the wall,wasn't he?
1.Who ___(find) that lost girl?Her mother must be happy now.
2.___ personal computers ___ (invent) in 1976?
麻烦说明一下为什么?

1.The boy ___ (ask) not to draw on the wall,wasn't he?1.Who ___(find) that lost girl?Her mother must be happy now.2.___ personal computers ___ (invent) in 1976?麻烦说明一下为什么?
1.was asked
1.found
2.Were invented

was asked
found
Was invented

1.The boy was asked (ask) not to draw on the wall, wasn't he?
1.Who found (find) that lost girl? Her mother must be happy now.
2.Were personal computers invented (invent) in 1976?