tens of trees were cut down,no onre knewwhoby whomwho to to do sowho does that为啥选第二个,
问题描述：
tens of trees were cut down,no onre knew
who
by whom
who to to do so
who does that
为啥选第二个,
答
trees were cut down by whom
这样一读,树是被谁砍倒的,就通了.