问题描述：
Be sure to practise all your language shills-_,reading
Be sure to practise all your language shills__,reading,writing,listening and speaking-in every lesson.
A that is B this is C it is D they are
Be sure to practise all your language shills__,reading,writing,listening and speaking-in every lesson.
A that is B this is C it is D they are
问题解答：
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