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A. Large quantities of, have been
B. A great many, has been
C. A large quantity of, were
D. Quite a lot, is
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(答案→)A. Large quantities of, have been
B. A great many, has been
C. A large quantity of, were
D. Quite a lot, is
解析：large quantities of +名词时,后面的谓语的单复数是看quantities，而不是名词。就是说只要用quantities of 后面的谓语就要用复数，quite a lot后不能直接加名词的要加of，故选A。