[ Grammar ]
In chemical terms radium ______ little from barium.
A. is different
B. differs
C. differed
D. is differing
Select your answer:
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________ is running.
A. He
B. She
C. His
D. Her
Modal Verbs › View
I ……………… pay for the tickets because I got them from Sam for free.
A. should
B. ought to
C. have to
D. don’t have to