This river has changed its course many times. It _________ always located where it ________ at present.
A.isn’t; is | B.isn’t; will be | C.wasn’t; is | D.wasn’t; has been |
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This river has changed its course many times. It _________ always located where it ________ at present.
A.isn’t; is | B.isn’t; will be | C.wasn’t; is | D.wasn’t; has been |