单项选择题

What is one Of the difficulties in Carrying out a world-wide birth control program

A．The level of education varies around the world.
B．The economists’ attitudes to population differ greatly.
C．The living standard varies from country to country.
D．The countries’ attitudes to population differ greatly.
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单项选择题
What does the man suggest the woman do
A．Show the add/drop form to Professor Smith.
B．Go on attending Professor Smith’s class.
C．Come to the registration office with the form.
D．Sort out the problem all by herself.
单项选择题
Why does the woman want to know the definite date for their arrival and the number of mem-bers in the delegation
A．She wants to book some plane tickets.
B．Her assistant needs to buy some books for them.
C．She needs to find a good hotel for the delegation.
D．Her assistant needs to arrange the accommodation.
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