• Choose the missing prepositions from the drop-down menus below.
  • Click the button at the bottom to check your answers.
  • Press the "refresh" button on your browser to play again.

   at      before      by      down      during      for      from      in      of      off      on      without   
If you ever feel the need to sleep while standing, a company in Japan has catered to your needs. The Koyoju Plywood Corporation Japan's northernmost island Hokkaido has unveiled the "Giraffenap" booth. This ingenious cubicle allows the user to sleep a vertical position. It will allow office workers and commuters to catch forty winks the need a bed. The designers say a 20-minute nap improves mental performance and increases productivity reducing fatigue. It also boosts concentration and aids memory retention. The Giraffenap pods come two designs – the futuristic-looking 'Spacia' and the lattice wood 'Forest'. They will go sale in December an expected price around $20,000.

The Giraffenap website says there is a need to refresh while work. It says: "It's so common these days to work non-stop without an opportunity to properly recover physical fatigue or stress, often resulting unwanted sleepiness the day. Now it's time to break the stereotype that nodding on the job is a sign boredom or laziness." The site added that naps allow "more efficient and fulfilling work". The website stated that napping reduces drowsiness, and improves ingenuity and creativeness. The designers offered some advice an effective snooze. The optimal time is 15 to 20 minutes, and all naps should take place 3 p.m. In addition, you should not lie as this leads to deep sleep.

Back to the vertical napping lesson.

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