[ Grammar for TOEFL ]
_____ of economic cycles been helpful in predicting turning points in cycles, they would have been used more consistently.
A. Psychological theories
B. Psychological theories have
C. Had psychological theories
D. Psychologists have theories
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Grammar › ViewYour library books are overdue. You _____ if you return those books immediately.
A. will not fine
B. will not fined
C. will not be fined
D. will be not fine
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What is th outermost layer of the Sun’s atomsphere, located above the chromosphere?
A. Corona
B. Photosphere
C. Chromosphere
D. Troposphere