问题
选择题
79. Before there goes the bell for class, our math teacher took out a piece of and wrote his problems on the blackboard.
A．brush pen
B．chalk
C．paper
D．Pencil
答案
B
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79. Before there goes the bell for class, our math teacher took out a piece of and wrote his problems on the blackboard.
A．brush pen
B．chalk
C．paper
D．Pencil
B