______ Flying Luxury Hotel of Tomorrow is ______ huge 400-ton aircraft without wings.
| A．/, a | B．The, a | C．The, the | D．A, a |
________ in the pervasive sunshine in the Southern Hemisphere of November, the Australian continent is brimming with vigour and vitality.
| A．Bathing | B．Bathed |
| C．To bathe | D．Having been bathed |
I look forward to my fifth trip to this land _______ I will pay a state visit to Australia and attend the ninth G20 summit, in Brisbane.
| A．during which | B．on which |
| C．at which | D．which |
Your ideas are very interesting, but we need ______ suggestions to get us out of the trouble.
| A．impressive | B．brilliant |
| C．practical | D．permanent |
It has been said that “happiness is like a butterfly, which, when________ , is always beyond our grasp, but which, if you will sit down quietly, may alight upon you.” (pursue)
| A．pursuing | B．pursued |
| C．to pursue | D．having pursued |
—Why does the River smell terrible?
—Because large quantities of water .
| A．have polluted | B．have been polluted |
| C．has been polluted | D．is being polluted |