Write one word in each gap

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FWrite one word in each gap.
Jetlag
When you travel (1). . the other side of the world, jetlag is a real problem. You
. the middle of the night and you feel like going to bed
find yourself awake (2) .
(3) . the morning, just when everyone around you is getting up.
Jetlag happens when you go (4) . a country where the time is very different.
For example, you might leave London (5). midday and fly (6) ..
Los Angeles. The flight takes about eleven hours, so when you arrive (7).
Angeles airport, your body thinks you're there (8) .
eight hours behind London, so you actually get there (9) .
(10) . midnight Los Angeles time, your body (which still thinks it's
. Los
11 pm. But Los Angeles is
. 3 pm local time. So,
(11)
London) says it's 8 am. It takes a few days for your body clock to
change.