（ ）_______ are from No.1 Middle School.A.Half them B.Half of

half of them.
做宾语
they的宾格是them

答案是B.Half of them

_______ are from No.1 Middle School.
A.Half them B.Half of them C.Half they D.Half of they
选B
Half of them在句中做主语。
of 是介词，介词后面要跟介词的宾语，them是宾格，可以做介词of的宾语。