WithHalloweenapproaching,thereexistsarealconcernamongparentsandteacherstrickortreatingwillbecomeaseriouslyanti-socialactivity.A．whetherB．whatC．thatD．how

Question

With Halloween approaching, there exists a real concern among parents and teachers __________ trick or treating will become a seriously anti-social activity.

A．whether

B．what

C．that

D．how

Answer 1

C

考查名词性从句。句中that解释说明名词concern顾虑，担心，根据句意选C。