1．(2019·苏州模拟)By now 516 Confucius Institutes (孔子学院) ________ in 142 countries and regions, according to the Confucius Institute Headquarters.
A．founded B．would found
C．have been founded D．had been founded
解析：选C 考查时态和语态。句意：根据孔子学院总部的统计，到现在为止，全世界142个国家和地区已经建立了516个孔子学院。主语516 Confucius Institutes和found之间是被动关系，该句应用被动语态，且by now作时间状语，谓语动词应用现在完成时态，故选C。
2．It's often less expensive to buy goods in ________ quantity，but you'd better examine ________quality before buying them.
A．a; the B．/; the
C．the; the D．the; /
解析：选B 句意：批量购物往往要便宜一些，但在购买之前你最好检查一下质量。in quantity为固定搭配，意为“大量”；而quality指所购之物的质量，为特指，前面要用定冠词the。故选B。
3．(2019·镇江质检)________ is known to everyone, the moon travels round the earth once every month.
A．It B．As
C．That D．What
解析：选B 考查定语从句。句意：正如每个人都知道的那样，月球一个月绕着地球转一圈。As is known to everyone/all“众所周知”，as引导非限制性定语从句有“正如，正像”之意。
