问题
选择题
The number of students in our school about 30 000 and them study hard.
A．is;a large amount of
B．are;a number of
C．is;large amount of
D．is;a large number of
答案
答案：D
the number of+复数名词，意为“……的数目”。作主语时，谓语动词用单数；a number of+复数名词。句意为：我们学校的学生数为30 000，并且大多数人学习努力。