单项选择题

After speaking for three hours, the lecturer found he could scarcely talk, as he had become ______.

A．dumb
B．inarticulate
C．hoarse
D．speechless
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单项选择题
It didn't seem to have ______ to her that once she was addicted to drug smoking, she could hardly give it up. But it did happen.
A．happened
B．took place
C．occurred
D．came about
单项选择题
Building this road will ______ the construction of ten bridges, then the total cost reaches 1 million US Dollars.
A．evolve
B．involve
C．revolve
D．devolve
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