—Mom,Ineedanewbackpackforthevacation.—OK,dear.I’llbuy

问题详情：

— Mom, I need a new backpack for the vacation.

— OK, dear. I’ll buy______for you this afternoon.

A. one       B. that        C. this         D. it

【回答】

A

知识点：不定代词

题型：选择题