—May I go and play with Dick this afternoon，Mum?
—No，you can’t go out________your work is being done.
| A．before | B．until |
| C．as | D．the moment |
Deserts, dry areas with _____ no vegetation, cover more than one-third of the Earth's land surface.
| A．surprisingly | B．eventually | C．permanently | D．virtually |
All too _____ it was time to go back to school after the glorious summer holidays.
| A．often | B．fast | C．soon | D．late |
The rainbow _____ as the sun came fully out from behind the clouds.
| A．dissolved | B．removed | C．resigned | D．disappeared |
The car salesman took the customer for a driver in the new model in order to _____ its improved features.
| A．advocate | B．demonstrate | C．exhibit | D．reveal |
I caught a _____ of the car before it disappeared around the bend.
| A．glance | B．glimpse | C．glare | D．gleam |