[ A] period
[ B] duration
[ C] course
[ D] length
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After reading the story what can we infer about the hospital?
[ A ] It is children ’hospital
[ B ] It has strict rules about visiting hours.
[ C] The nurses and doctors there don ' t work hard.
[ D] A lot of patients come to this hospital every day.
When he was in the countryside, he ______ visit the poor peasants.
[A] used to
[ B] was used to
[C]is used to
[D]had used to
[A] extension
[B] expansion
[C] effect
[D] extent