a lot of trees have been planted 变一般疑问句(并回答) /变否定句

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a lot of trees have been planted 变一般疑问句(并回答) /变否定句
a lot of trees have been planted 变一般疑问句(并回答) /变否定句

a lot of trees have been planted 变一般疑问句(并回答) /变否定句
Have a lot of trees been planted?
Yes,they have./NO,they haven't.
A lot of trees haven't been planted.