Question

The problem with being a time waster is _____the online game playing often spills over into the periods of time that should be productive.

A．what

B．which

C．that

D．whether

Answer 1

C

本題考查名詞性從句。句中that引導表語從句，在從句中不作任何成分，但在表語從句中不可以省略，故選C。