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TT B4 U8 L3.3
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When you........... (be) in the nature reserve, you...........(pick) flowers.
are, mustn't pick
Oops!
Okay!
When you are cold, you ...........(should dress) more warmly.
should dress
Oops!
Okay!
If it rains,.............( take) an umbrella!
take
Oops!
Okay!
If water freezes, it ...........................(expand).
expands
Oops!
Okay!
If you go through the Sahara desert by foot, it .............(take) you nearly 50 days to cross it.
will take
Oops!
Okay!
If you ..........(have) a picnic, you.......(clean up) before you leave.
have, must/should clean up
Oops!
Okay!
You ............( dehydrate) if you .............(not drink) enough water.
will dehydrate, don't drink
Oops!
Okay!
When we heat water to 100C, it .....(boil)
boils
Oops!
Okay!
If people .........(use) fluorescent light bulbs, they .....(help) save energy.
use, will help
Oops!
Okay!
The Arctic ocean becomes almost completely covered in ice when it............(be) winter.
is
Oops!
Okay!
You...............(save) money and ............(help) environment if you carpool.
will save, help
Oops!
Okay!
We............(slow down) global warming if we all..........(act) now.
can slow down, act
Oops!
Okay!
When we recycle one tone of glass, we...........(save) 315 kg of CO2.
save
Oops!
Okay!
When Arctic ice caps and glaciersmelt, sea levels..........(rise)
rise
Oops!
Okay!
If deforestation ............(continue), wildlife and many plants............(become) extinct.
continues, will become
Oops!
Okay!
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