单项选择题

Which type of printing is more convenient based on the passage（）

A. Movable type.
B. Baked clay.
C. Block printing.
D. Wet ink.

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单项选择题24（）

A.When
B.That
C.So
D.Though

单项选择题The best title for this passage could be （）

A. Black History
B. Educational Opportunities for Blacks
C. The Fight for Equality
D. Civil Rights Workers of the ’60s