下列各句中，没有语病、句意明确的一项是 （ ）

How do you study ______ a test ——I study _____working _____a group.

Jenny took the 8:00 bus to Guangzhou this morning. — Really? He _____the 9:00 train. It’s much more comfortable and safer to travel by train. [ ]

It was in the dining hall _______ was locatedbehind the teaching building _______ I met her for the first time.

Did you watch the opening ceremony (开幕式) of the Nanjing YOG— Yeah. It was _____on CCTV and Jiangsu TV.