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Exercise "Efficient or Effective", created by greg100 (a free exercise to learn English):
Results of the 3 080 people who have taken this test:
Average mark: 74 / 100 Share
Latest member with a 100/100 (perfect mark): bleuclair64 / FRANCE, on Tuesday 09 February - 08:43:
They got a perfect mark
Stats (3079 candidates)
Question 1 passed: 83.8 %
This is the best car on the market.Its * engine saves gas.
Question 2 passed: 58.3 %
The vitamin appears to be more * than vaccines at preventing influenza infections.
Question 3 passed: 50.7 %
It may be the most * at reducing fever.
Question 4 passed: 91.6 %
* employees are those who are productive without waste.
Question 5 passed: 63.6 %
The law is * from Friday.
Question 6 passed: 71.3 %
That teacher is quite * at making his students learn English.
Question 7 passed: 84.6 %
My computer is energy - * . It saves energy.
Question 8 passed: 54.9 %
This medicine is one of the most * pain relievers.
Question 9 passed: 86.6 %
I'm very * as I know how to get things done without wasting time.
Question 10 passed: 86.8 %
* energy use is the solution to expending less energy.
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