It was not rare(稀少) in      that people in      fifties were going to school for further study.
#66542
A
90s; the
B
the 90s; /
C
90s; their
D
the 90s; their
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I ________ be quite bored with the job, but now I have________ to it.
#83506
A
used to; been used
B
used to; used
C
was used to; got used
D
was used to; been used
The North Pole is ____ all the white snow here and there all the year round.
#80856
A
full of
B
fill with
C
covered by
D
covered with