用方框中所给单词的适用方框中所给单词的适当形式填空,使短文通顺、正确、连贯(每个单词限用一次).something,not,tree,simply,spend,you,why,that,they,if,little,go,in,o

Question

用方框中所给单词的适

用方框中所给单词的适当形式填空,使短文通顺、正确、连贯(每个单词限用一次).

something,   not,   tree,   simply,   spend,   you,   why, 
 that,   they,   if,   little,   go,   in,   on,   protect

The Earth needs a helping hand
     The Earth is getting warmer because of the activities of people.We cut down and burn 1______ and
send gases into the air with our cars and factories.Can we do anything about it?Sure.We may 2______
be leaders or scientists but we can play our part in 3______ the planet.Here are two ideas.
Bike,don't ride to school
     Do you 4______ to school by bus or by bike?If you bike,you are doing 5______ for the Earth.Buses,
cars,trains and planes produce a lot of carbon dioxide (二氧化碳).If you live near to your school,6______
not bike there on warm spring mornings?Or,you can 7______ walk to school to save energy. 
 Wash the green way
     Do you help your mom and dad wash clothes?Then wash them 8______ an energy-saving way.A recent
study by Cambridge University found 9______ 60 percent of the energy used on a piece of clothing is 
10______ in washing and drying it.Over ita lifetime,a T-ahirt can send up to 4 kilograms of carbon dioxide
into the air.
     11______ you wash your own clothes,wash them in cold or warm water to save energy,but not hot water.
Wash your clothes when 12______ fill up the machine.Use the most energy-saving machine you can find.
Some new ones use as 13______ as one-fourth of the energy of older machines.When they're clean,dry 
14______ clothes the natural way,by hanging them 15______ a line rather than putting them in a dryer.In all,
you can cut the carbon dioxide used in washing by 90 percent.

Answer 1

1. trees   2. not   3. protecting  4. go  5. something
6. why  7. simply  8. in   9. that  10. spent  
11. If   12. they   13. little   14. your  15. on