单项选择题

The ______ were obliged to sweep away the tree ______ from the ______.

A．serfs.., leaves.., roofs
B．serves.., leafs.., roofs
C．serfs.., leaves.., moves
D．serfs.., leaves.., roofs
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单项选择题
All the key words in the article are printed in ______ type so as to attract readers' attention.
A．dark
B．dense
C．bracket
D．bold
单项选择题
His nationality isn't ______ to whether he is a good lawyer.
A．concerning
B．dependent
C．connecting
D．relevant
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