Question

It is reported that two schools，_______ are being built in my hometown，will open next year.

A．they both

B．which both

C．both of them

D．both of which

Answer 1

D

both of which引导非限制性定语从句，which指代先行词schools,作of的宾语。they both和both of them都不能引导定语从句，所以是错误的。which both中的which不能修饰both，所以也是错误的。