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【单选题】
我国铁路共划分为（）个等级。A.
一
B.
二
C.
三
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反馈参考答案：
举一反三
【单选题】Please be quiet, my grandmother _______. [ ]
A.
sleep
B.
sleeps
C.
is sleeping
D.
are sleeping
【单选题】The dog pretends _____. Maybe it will bark _____ you. [ ]
A.
to be sleeping, ／
B.
to be sleeping, at
C.
be sleeping, at
D.
be sleeping, ／
【单选题】'Sleeping like a dormouse' most probably means
A.
sleeping longer on cold days.
B.
sleeping badly.
C.
sleeping with a lower heartbeat rate.
D.
sleeping with little breathing.
【单选题】There are some students ________ in the English lesson.
A.
are sleeping
B.
sleeping
C.
to sleep
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