单项选择题
If there are any new words, ______ in a dictionary.
A．look them through
B．look them up
C．look them over
D．look them up and down
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单项选择题
--Have your students ever seen the silent film --No, they are too young ______ the old film.
A．to seeing
B．have seen
C．to have seen
D．to have not seen
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单项选择题
A ______ talk is too long for those children.
A．two hours
B．two hour's
C．two-hour
D．two-hours
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