There is ______ trouble on the frontier; every few months fighting breaks out.选项:a、constant b、 continual c、 continuous d、 consistent

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Thereis______troubleonthefrontier;everyfewmonthsfightingbreaksout.选项:a、constantb、continualc、continuo

There is ______ trouble on the frontier; every few months fighting breaks out.选项:a、constant b、 continual c、 continuous d、 consistent
There is ______ trouble on the frontier; every few months fighting breaks out.
选项:
a、constant
b、 continual
c、 continuous
d、 consistent

There is ______ trouble on the frontier; every few months fighting breaks out.选项:a、constant b、 continual c、 continuous d、 consistent
C