单项选择题

______, I must do another experiment.

A．Be it ever so late
B．It is ever so late
C．It be ever so late
D．So late it be ever
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单项选择题
Since it is too late to change my mind now, I am______ to carrying out the plan.
A．obliged
B．committed
C．engaged
D．resolved
单项选择题
There are nations whose lack of contact with the outside world has______ poverty.
A．fallen into
B．consisted in
C．resulted in
D．come up to
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