Attached to this letter _______ a copy of B/L,along with copies

Attached to this letter _______ a copy of B/L,along with copies of invoice and weight memo.
A、are
B、is
C、have been
D、has been
【正确答案】：B
【题目解析】：[解析]句意：海上运输提单、发票和货运重量单的复印件附在信后。该句的主语为“a copy of B/L， along with copies of invoice and weight memo”，以 along with, together with, as well as, rather than, but, except, accompanied by等连接的两个主语，其谓语单复数形式以第一个为主，故谓语动词用单数形式，此 处用一般现在时即可，故选B。