[ Phrasal Verbs ]
Scientists have recently …………….. research on blood lead levels of athletes.
A. carried out
B. found out
C. narrowed down
D. resort to

Random Topics:
Present Simple Affirmative and NegativeGrammar PhrasesPresent ContinousPresent Tense (Negatives and Questions)Present Perfect Simple vs ContinuousInfinitives and GerundsNouns as AdjectivesGrammar: Defining Relative ClausesPreposition and Word FormDependent PrepositionOther quiz:
Grammar › ViewI__________in this building for the last five years,
A. have lived
B. was living
C. have been living
Grammar › View
Since……………, I have heard nothing from him.
A. he had left
B. he left
C. he has left
D. he was left
Grammar › ViewWhat is the past tense form of the verb “fight”?
A. fighted
B. fought
C. fight
D. fighting
Modals › View
____ we go to the beach this weekend if the weather is nice?
A. Shall
B. Might
C. May
D. Would
