_______ all of them are strong candidates, only one will be chosen for the post.
A．Since B．If C．As D．While
______ about the safety of the people in the earthquake-stricken Lushan county in Sichuan Province, Premier Li has flew there to direct the rescue mission.
A．Concerning B．Concerned C．To be concerned D．Concern
______ really makes “Gangnam Style” popular is not the lyrics, but the part of “Horse Riding Dance”.
A．What B．That C．Where D．When
Tony ________ for the company as an engineer for two decades. Now he teaches mechanics in Peking University.
A．has worked B．worked C．is working D．had worked
Modern teaching equipment as well as some computers ________ to the village school last week.
A．were sent B．was sent C．has been sent D．had been sent
It's on the festival occasions________ the family get together________ he misses his late father.
A．where; that B．which; when C．when; that D．that; when
