题目内容
There is ________ “u” and ________ “s” in ________ word “useful”.
A. an; a; the B. a; an; a C. a; an; the D. an; a; the
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题目内容
There is ________ “u” and ________ “s” in ________ word “useful”.
A. an; a; the B. a; an; a C. a; an; the D. an; a; the