題目列表(包括答案和解析)
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
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
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
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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