选择正确的词完成句子.()(is/are)this your pencil?yes,it i选择正确的词完成句子.()(is/are)this your pencil?yes,it is.do you have()(a/an)eraser?

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选择正确的词完成句子.()(is/are)this your pencil?yes,it i
选择正确的词完成句子.
()(is/are)this your pencil?yes,it is.
do you have()(a/an)eraser?

is an