Quickly!Tom，give me pen to mark the page.I seeunder the book.A. /；it B. a;thatC. the;one D

Quickly!Tom，give me pen to mark the page.I see under the book.
A. /；it
B. a;that
C. the;one
D. a;one

A. /；it B. a;thatC. the;one (答案→)D. a;one解析：本题考查冠词。第一空后pen为可数名词，表泛指；第二空，指同类的物，用one。

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