I can’t say which wine is best—it’s a(n) of personal taste. A. affairB. eventC. matterD.

问题补充：

I can’t say which wine is best—it’s a(n) of personal taste.

A. affair

B. event

C. matter

D. variety

答案：

A. affair

B. event

C. matter

D. variety

解析：

C。it’s a matter of…为英语惯用表达，其意为“是一个……问题”，又如：Of course this must have priority—it’s a matter of life and death. 当然这一点必须优先考虑——这是成败的关键。