[ Vocabulary and Grammar ]
People are now trying to lead a greener way of life by using ____________ coal and oil.
A. less
B. more
C. most
D. fewer

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Knee Anatomy › ViewWhat bone is the knee cap?
A. Tibia
B. Fibula
C. Patella
D. Femur
Grammar › View
Walking is ___ for your health.
A. bad
B. worse
C. good
D. better
Comparison of Adjectives and Adverbs › ViewTiger is a fast animal, but not …………………. .
A. faster
B. faster than
C. fastest
D. the fastest
Grammar › View
________ bag is that?
A. What
B. Who’s
C. Whose
D. Which
