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While Tom (read)______ , Amely (watch)_____ a documentary on TV.

• was reading / was watching

• read / watched

• was reading / were watching

• read / was watching

Alan (look) _______out of the window when he (see) ______ a UFO.

• was looking/saw

• looked/ saw

• was looking / seen

• looked/ was seeing

Different kinds of waste are dumped in __________ sites.

• landfill

• leftover

• resource

• footprint

Leaving the tap running while washing the dishes is purely a __________ of clean water.

• awareness

• waste

• pile

• packaging

By taking fewer flights, we can help to reduce __________ significantly.

• cardboard

• leftover

• fruit peel

• carbon footprint

Plastic bags __________ very slowly, which poses a threat to the ecosystem.

• release

• reuse

• decompose

• recycle

Protecting the environment is crucial for a more __________ future.

• sustainable

• reusable

• single-use

• recyclable

We can use leftovers to make simple __________ to enrich the soil.

• waste

• container

• compost

• layer

The ocean was __________ as a result of a recent oil spill.

• sorted

• decomposed

• recycled

• contaminated

Many celebrities adopt a green lifestyle, __________ helps the environment a lot.

• that

• what

• whose

• which