Whenever I met her，__________ was fairly often, she greeted me with a sweet smile.
| A．who | B．which |
| C．when | D．that |
Several musicians say they consider it the greatest musical composition _______ written.
| A．already | B．once | C．before | D．ever |
Since the recent river pollution in several provinces, people _______ more and more attention to the quality and safety of drinking water.
| A．pay | B．are paying | C．have paid | D．have been paying |
Finally he reached a lonely island ________ was completely cut off from the outside world.
| A．when | B．where | C．which | D．whom |
China’s first aircraft carrier, ____ as long as 304 metres, was handed over to the People’s Liberation Army navy in 2012.
| A．measures | B．measured | C．to measure | D．measuring |
It was difficult to tell exactly _______ the saying began, but it is possible that it was in the theatre or movie industry.
| A．where | B．when | C．why | D．that |