单选题
16.
Of particular interest to visitors ______ the large number of bookstores that sell books in different languages.
A、
are
B、
is
C、
were
D、
was
【正确答案】
B
【答案解析】
此句中，the large number of bookstores是本句的主语，所以系动词用第三人称单数。
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