下列各句中，没有语病的一句是（ ）

下列各句中，与其他几项在句式上不同的一项是（2分）

hanghai World Expo drawingnear, volunteers are making use of every minute to ____ their foreign languagebecause language volunteers must pass a written test and an interview.

Only those ____knew well could be let in.

“It’s a secret….” he lowered his voice and whisperedno one could overhear it