[ Modals ]
We —- cross the street when the light is red.
A. mustn’t
B. needn’t
C. don’t have to
D. can’t
E. couldn’t

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Subject Verb Agreement › ViewThe new dress (fit/fits) perfectly for Olivia.
A. for
B. fitted
C. fitting
D. fit
Grammar › View
The first electric lamp had two carbon rods from which vapor serves to conduct the current across the gap.
A. The first
B. which
C. serves
D. to conduct