i don't know the size for my trousers.may i___?a.try it on b.try them on c.thy on them
问题描述：
i don't know the size for my trousers.may i___?a.try it on b.try them on c.thy on them
答
选B.
首先,trousers复数,排除a
try sth on翻译为试穿,而没有try on sth,因此答案是B