The speed limit for bicycles on campus is 15 mph, ___________ otherwise posted.
| A．unless | B．until | C．since | D．however |
When it was his turn to deliver his speech，________，he walked towards the microphone.
| A．nervously and embarrassingly |
| B．nervous and embarrassedly |
| C．nervously and embarrassing |
| D．nervous and embarrassed |
In order to meet the demands they had to________production.
| A．fasten up | B．rise up |
| C．speed up | D．go up |
After he retired from office，Royers________painting for a while，but soon lost interest.
| A．took up | B．saved up |
| C．kept up | D．drew up |
________China has successfully launched its Shenzhou Ⅵ with two astronauts in it has shocked the world.
| A．What | B．As |
| C．It | D．That |
Come and see me whenever________.
| A．you are convenient | B．you will be convenient |
| C．it is convenient to you | D．it will be convenient to you |