easy to use, worldwide system of measurement based on powers of ten. The standards are used by all scientists, and are a modern version of the metric system.
A. SI Standard
B. scientific law
C. observation
D. Metric System
E. English System of measurement

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Future Continuous, Future Perfect and Future Perfect ContinuousAsking for and Giving OpinionLinking Verbs and TensesTenses and StructureHelpful Phrases ModalElectricity VocabularyBe used to vs used toWill vs be going toConjunctive AdverbsOther quiz:
Modals › ViewIdentify the modal in the following sentence: Individuals can contribute to the preservation of natural resources by reducing their carbon footprint.
A. contribute
B. can
C. carbon
D. preservation
Grammar - First Conditional › View
If he _________ (give) me a lift, I _________ (be) late for the meeting.
A. will give / won’t be
B. gives / won’t be
C. give / won’t be
D. will give / will be
Grammar › ViewI was kissed ______ a handsome guy
A. by
B. with
Grammar › View
Check the underlined clause, is it essential or nonessential?
Chinese schoolchildren learn dances that require difficult body movements.
A. Essential Clause
B. Nonessential Clause
