[ Grammar ]
If we ______ a practical point of view, then the most important property of the rays is the production of physiological effects on the cells of the human organism.
A. are taking
B. take
C. takes
D. to take

Random Topics:
Mixed ConditionalsModals and Comparative SuperlativeAdverbSimple Present Tense vs Present Continuous TenseGrammar - to bePresent Simple and Present Continuous TensesAdjectives with -ED and -INGAdverbs, Infinitives, Definite ArticleIF CLAUSEGerund - to InfinitiveOther quiz:
Grammar and Vocabulary › ViewMy father was ________ mad when he found out my loss of ID card two days prior to
the National University Entrance Exam.
A. barking
B. hopping
C. skipping
D. shouting
Grammar › View
Beckky loves fishing —– Beckky cannot fish if she does not wake up early.
A. but
B. or
C. so
D. for
Present Tense › ViewShe _____ to England three times.
A. having been
B. has been
C. have been
D. had been
Grammar › View
Jenny is fond ____ kittens.
A. by
B. in
C. of
D. for
