America will never again have as a nation the spirit of adventure as it ________ before the West was settled.
A could
B was
C would
D did
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People who refuse to ________ with the law will be punished.
A obey
B consent
C conceal
D comply
I ________ to him because he phoned me shortly afterwards.
A ought to have written
B must have written
C couldn’t have written
D needn’t have written
These excursions will give you an even deeper ________ into our language and culture.
A inquiry
B investigation
C input
D insight
There is no electricity again. Has the ________ blown then?
A fuse
B wire
C plug
D circuit