问题补充:
the doctors in their hospital is about one thousand, and sixty percent of them women.
A. A number of; is
B. The number of; are
C. The number of; is
D. A number of; are
答案:
A. A number of; is
(答案→)B. The number of; are
C. The number of; is
D. A number of; are
解析:句意:他们医院的医生的数量大约是一千,百分之六十是女的。the number of....的数量。a number of许多。因为doctor是可数名词,所以系动词要用are。故选B.