In 1620,about half of the USA___covered by forest A:are B:is C:were D:was 选几?急答!
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In 1620,about half of the USA___covered by forest A:are B:is C:were D:was 选几?急答!
In 1620,about half of the USA___covered by forest A:are B:is C:were D:was 选几?
急答!
In 1620,about half of the USA___covered by forest A:are B:is C:were D:was 选几?急答!
was
D