单项选择题

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A.5:00.
B.5:15.
C.5:30.
D.5:45.
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单项选择题
The first and most important thing parents should do to help their children is ________.
A.to provide them with a safer environment
B.to lower their expectations for them
C.to get them more involved socially
D.to set a good model for them to follow
单项选择题
A.They were the first successful steam-powered ships.B.They were more reliable than other ships of the 1860s.C.They carried passengers, but not cargo.D.They were large but surprisingly fast.
A.They were the first successful steam-powered ships.
B.They were more reliable than other ships of the 1860s.
C.They carried passengers, but not cargo.
D.They were large but surprisingly fast.
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