单项选择题

As early as 1647 Ohio made a decision that free, tax-supported schools must be established in every town ______ 50 households or more.

A．having
B．to have
C．to have had
D．having had
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单项选择题
This box is too heavy, ______ give me a hand
A．would you mind
B．would you please
C．will you like to
D．will you please to
单项选择题
Although punctual himself, the professor was quite used ______ late for his lecture.
A．to have students
B．for students' being
C．for students to be
D．to students' being
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