单选题
The author says children in the city seldom went to the woods and the fields because ______.
A、
all these places were too far away for them to go
B、
it was impossible for them to go and get back in one day
C、
they were not old enough to take such a trip
D、
they were not permitted to go to these places
【正确答案】
B
【答案解析】
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