[ Subject-Verb Agreement ]
What (does, do) scientists know today about elements?
A. Does
B. Do

Random Topics:
ApologizingSimple vs Continuous Past TensePrepositions - ConjunctionsIndefinite PronounsSimple, Compound, Complex SentencesPast Tense and Perfect TensePrepositions and Prepositional PhrasesPoetryTenses and StructureSimple Present Tense vs Present Continuous TenseOther quiz:
Grammar › ViewWhich sentence is correct ?
A. In the distance wailed a low siren mournful.
B. A mournful low siren wailed in the distance.
C. A low mournful siren wailed in the distance.
D. Mournful and low the siren in the distance wailed.
Some vs. Any › View
There isn’t ___ food left in the refrigerator.
a. some
b. any
First & Second Conditional › ViewIf you ______ the job, you should tell her.
A. didn’t want
B. don’t want
C. won’t want
Grammar › View
Identifying Active and Passive Voice: The popcorn, nachos, hot dogs, and sodas were dropped on the dusty baseball diamond by the child.
A. Active Voice
B. Passive Voice
