_ _ is well-known to all that the 2016 Olympic Games will be held in Rio de Janeiro ,Brazil.
| A．As | B．What | C．That | D．It |
_______ by keeping down costs will Power Data hold its advantage over other companies.
| A．Only | B．Just | C．Still | D．Yet |
--- I didn’t invite him to the party but he came anyway and got completely drunk.
--- _______ he hadn’t come! The party could have been a success.
| A．How come | B．Only if | C．What if | D．If only |
--- How can I repair it?
--- Well, look at the _________.
| A．explanations | B．expressions | C．instructions | D．introductions |
He _____ some safety measures at the meeting for the 2010 Shanghai Expo.
| A．put forward | B．put up | C．put down | D．put off |
In the past few years, __________much improvement in the traffic.
| A．there has been | B．there has had | C．there have been | D．there had been |