How many students are there in your school?There are 2 000 students here .A. first

问题补充：

--- How many students are there in your school?

--- There are 2,000 students here .

A. first of all

B. in all

C. after all

D. at all

答案：

A. first of all

(答案→)B. in all

C. after all

D. at all

解析：考察介词短语辨析。A首先，最重要的是；B共计；C终究，毕竟；D根本，全然；句意：—你们学校有多少学生？—共计2000个学生。根据句意说明B正确。