___________ of precious gems is determined by their hardness, color, and brilliance.
A. The valuable
B. It is the value
C. It is valuable
D. The value

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Be Going To vs. WillNoun QuantifiersCoordinating and Subordinating ConjunctionsDescribing WordsModals in the Past - Speculation and DeductionGrammar - direct/indirect objectsSecond ConditionalsModal Verbs and Contrastive ConjunctionsFamily VocabularyConditional TypesOther quiz:
Tenses › ViewThis plane _____ by the Red Baron.
A. was flown
B. will fly
C. had flew
D. have flown
Tenses › View
The tomatoes ——————– when they ——————–
a) Were picked, were ripe
b) Were picked, are ripe
c) Picked, ripe
d) Were picked, had ripe
Ms Pang asked, ‘Should we cancel the grammar test?’
A. Ms. Pang asked should we cancel the grammar test
B. Ms. Pang asked if we should cancel the grammar test.
C. Ms. Pang asked we should cancel the grammar test.
D. Ms. Pang asked if should we cancel the grammar test
Grammar › View
What form does the ‘past perfect’ tense take?
A. Subject + have/has + V3
B. Subject + had + V3
C. Subject + have/has + V2
D. Subject + had + V2