--The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?
--________ my students have a try?
| A．Should | B．Shall | C．Will | D．May |
___around the Water Cube, we were then taken to see the Bird’s Nest for the 2008 Olympic Games.
| A．Having shown | B．To be shown |
| C．Having been shown | D．To show |
____ succeed in doing anything .
| A．Only by working hard we can | B．By only working hard we can |
| C．Only we can by working hard | D．Only by working hard can we |
The day he had been looking forward to _____at last.
| A．coming | B．came | C．had come | D．have come |
________ and short of breath，Andy and Ruby were the first to reach the top of Mount Tai.
| A．To be tired | B．Tired | C．Tiring | D．Being tired |
Little ______ about his own health though he was very ill.
| A．he care | B．he cares | C．does he care | D．did he care |